If it's time to update the interior of your apartment, your house, and also if you want to give new life favorite items, then you need to think about what to do with those things that were originally painted different types paints.
Naturally, applying a fresh layer of paint material to an old one may not bring the desired result and a once-loved trifle, an old grandmother's chest, or even Entrance door look sloppy and completely unsightly.
Before you start the time-consuming and slow process of removing the previous coating, you need to decide whether you need to remove the old paint?
Well, if you are going to the surface where the old paint is, apply ceramic tiles, plaster, stick wallpaper or the old paint is cracked, the surface is uneven, streaked, bumpy, then by all means - this coating must be removed.
And if you are sure that only one or two layers of paint have been applied, the surface is even, not cracked, the color is more or less consistent with the next coating and the texture is oily, then with skillful processing, you can apply a new layer.
To do this, it is necessary to sand the previous layer with a sandpaper, thereby removing tubercles and minor irregularities, then treat with an alkaline solution (either purchased at a hardware store or soapy home cooking), make a primer (synthetic or alkyd primer), dry and now the surface is ready for painting.
Otherwise, when the multi-layer applied paint material is unknown, deformed from time and conditions environment and you plan to change the invoice and appearance over the applied layer, then the restored thing will lose its freshness and attractiveness quickly enough.
So, let's take a look at how and how to remove layers of old paint? To do this, first of all, you need to see what surface it is applied to: concrete, brick, wood, metal; or on building mixtures - drywall, plaster. Secondly, try to understand what kind of paint is used.
Be sure to try scratching a small area with a spatula to see how many coats have been applied. After the study, you can start choosing a method for cleaning the surface.
In fact, there are not so many cleaning methods, so if you approach each method in detail, then without any unnecessary effort, the paint will be cleaned off and the surface will be properly prepared for renewal.
The main, frequently used methods used by professional builders:
We will analyze each of the methods in detail, taking into account which surface needs to be cleaned. Thus, the reader will be able to easily determine by what method the old paint is quickly removed, to choose the most convenient and inexpensive method for himself.
This method includes two methods:
The mechanical method is the most inexpensive, but in the case of a large surface for processing, the multi-layered material to be removed and the prescription of its application, it is distinguished by a very difficult use of physical force and a long procedure for removing paint.
But, if you have strong physical strength and are not limited by temporary obligations, then it is quite possible to use this environmentally friendly method. For example, use an axe.
This method is great if the room is small, not ventilated (kitchen, bathroom), before tiling or plastering.
To do this, chips are made along the surface of the wall with an ax, at the right angle, then this part is filled with water and, after impregnation, the paint is peeled off by the sharp actions of an ax or a hammer with a chisel. This is a long and difficult process, and if concrete is painted with paint, this method is not effective!
Therefore, it is much easier to use a mechanized method, that is, using a power tool.
The advantages of this method are non-toxicity, as well as trouble-free removal of old paint, regardless of the age of application, texture and number of layers.
Cons - incredible noise, strong dustiness, a huge amount of garbage and a large number of time for processing. One of the most important points is the availability of the necessary tool:
That is, this method can be used, but you need to understand that it is long, physically difficult and requires a certain skill.
Just remember to wear a dust mask and try to use power tools carefully to avoid mechanical damage skin.
This method is more perfect. With the correct use of this method, there will be no more questions about how the old paint is removed. It is aimed at ensuring that any type of paint softens and can be easily removed with construction spatulas, brushes, scrapers.
In addition, chemical reagents can be prepared by yourself or bought in specialized hardware stores. The range of these products is quite wide (alkaline or organic type), only it is necessary to take into account the texture and age of the paint to be removed.
The advantages of this method are the negligible use of physical force, ease of use, very fast response and for all surfaces and types of paints.
There are, perhaps, too many cons, but if you carefully use the instructions for using the reagent, correctly apply means that protect against certain influences, work in a well-ventilated area, then the result will pleasantly surprise you!
So, if you have purchased a chemical reagent, carefully read the instructions for use, wear gloves, a respirator, goggles, a suit that covers open areas body, allow the room to be constantly ventilated, or work outdoors.
Now evenly, using a brush (a roller is also suitable), apply the solution and leave for the required amount of time. After softening the layer to be removed, remove the surface with spatulas, brushes or scrapers. If the paint is partially left, repeat the manipulation again.
In addition to toxicity, this method is quite expensive. To reduce the cost of the process, you can use your own prepared mixtures.
For example, if the surface (floor) allows, you can moisten it with plain water and generously cover it with soda ash, cover it with damp rags on top, maintain the humidity of the treated surface for a day, and then the swollen paint will be easily peeled off under the action of a spatula.
Very often, inventive people use the composition of three parts of quicklime and one part of soda ash diluted in water to a density. This mixture is enough to apply for twelve hours and then in the same way, with a spatula, remove the softened paint.
Some others are trying to use a solution of liquid glass. It is bought ready-made, applied to the surface to be treated, allowed to dry completely, and, thanks to the properties of this substance, the hardened liquid glass eventually separates along with the surface on which it was applied.
It is very often used for those surfaces and elements where there is glass or other fragile material - glazed windows and doors. To perform, you must have a building hair dryer. And then everything is nowhere simpler - with one hand the surface to be treated is heated to a certain temperature, and with the other, the heated paint is almost immediately cleaned off.
This is very important, because if you let the paint cool again, with each subsequent heating, it will become more and more difficult to remove it!
If there is no hair dryer, you can use a simplified method - using foil and an iron: the foil is placed on the surface, heated with an iron, and also, without allowing it to cool, is removed from the treated area.
Everything is very simple, but, as always, there are disadvantages:
So, if this method suits you, then be sure to perform it in a respirator, try to avoid burns and ventilate the room well.
Given all these methods, will the question of removing old paint from a wooden surface necessarily arise?
Painted wood products can include plank floors, skirting boards, parquet, frames and more, as well as small pieces for furniture and items such as chests, boxes, etc.
Having carefully studied the methods above, you can choose any, given that the surface of the tree is quite soft and rough objects - a drill, a puncher, violate the integrity of the surface of the product.
In the case when the paint has already peeled off and is moving away from the wooden surface, you can safely use the method, which includes the use of a spatula and sandpaper - mechanical.
The meaning of this work is scraping off the paintwork. If the surface allows, you can use a grinder using attachments with non-rough abrasive surfaces.
If the paint lies tightly on the surface, you can use the chemical method, only it is necessary to select a reagent for a particular breed of wood being processed. Before applying the substance, clean the surface of dirt and dust with a damp rag, then, in accordance with the instructions, use the product, carefully clean off the residue with a spatula.
Use the thermal method with great care, because when heated, the structure of the wood is disturbed and the surface, being exposed to too high a temperature, is burned through!
But this method is quite effective for wooden surfaces, the paint quickly warms up, swells, bursts, after which it is quite easy to remove it.
In addition, a hot topic, the removal of old paint from metal elements, surfaces, details, about the nuances when using different methods and their effectiveness. Naturally, use the previously presented cleaning methods, but in this case, it is necessary to take into account the thickness of the metal and its grade.
Any mechanical method using a power tool is considered very effective. It must be taken into account that if the paint is peeled off from a thin metal surface, then a neat, painstaking manual cleaning method is suitable, but sandblasting is perhaps the most effective. Sand knocks paint particles off even the most hard-to-reach places, without much damage.
For the chemical method, it is necessary to select a reagent for a specific metal surface and, further, in accordance with the instructions, clean the layers of paint.
Aerosols are very easy to use - they are presented in a large assortment in hardware stores.
The thermal method must be used very carefully, since it cannot be used on cast iron, brass, aluminum products, as well as decorative forged elements. So before using this method, consult with a specialist.
Now, with this knowledge, choose the cleaning method that suits you best, but in any case do not forget about the use of personal protective equipment. And believe me, using all these tips, you will get a positive result of your hard work!
O one of the most "sick" questions that arise during cosmetic and major repairs - how and with what to remove or remove old paint. The task is not easy, because when creating new types of paints, their manufacture, the task of the developers is exactly the opposite - how to make the paint more stable and durable. However, there are ways to clean old paint from surfaces, and we will talk about many of them below.
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Video version of the article
Let's start with removal, removal from various surfaces coatings from oil (alkyd) paints. There are three ways in which this problem is solved: thermal, mechanical and chemical, as well as their various combinations. The most common of these methods is thermal, with partial use of mechanical cleaning.
This process is carried out as follows: old paintwork heated to the softening temperature and in this state it is scraped off with a steel spatula. The coating is heated using a blowtorch, gas burner or industrial hair dryer.
The thermal method is simple, effective, but has its drawbacks and limitations. For example - it will not be possible to remove paint from plastic, since most plastics begin to deform already at two hundred degrees Celsius. In addition, the use of devices that create a jet of hot fire is not always safe. In enclosed spaces, another factor comes into play that limits the use of the thermal method - the release of toxic substances from paints when heated.
A big disadvantage of the thermal method of cleaning old paint is also the fact that it can be used to clean far from any surface, even heat-resistant. It is not very effective when cleaning massive metal surfaces.
The technology for applying thermal cleaning of paint is simple: with one hand they hold a heating device, directing a flame or hot air to the surface, moving the jet as the paint softens, and with the other hand, along the way, they clean off the softened paint with a spatula. The skill of working simultaneously with both hands is developed literally in ten to fifteen minutes.
There are also attachments made of metal chains, often homemade, for removing paint with a drill - this method is crude, but often convenient.
In addition to these tools, there are more specialized devices - surface grinders and cleaning mills. The latter are effective in removing paint from plastered, stone, concrete and other similar surfaces, but are unsuitable for metal.
Surface grinders for cleaning oil compositions are ineffective, since sandpaper quickly becomes unusable, clogging with paint, but sometimes, especially if high-quality processing of small areas is necessary, they are not replaceable. In addition, they are well removed most water-based compositions.
The technology for cleaning old paint with a power tool is even simpler than with the thermal method: the working part of the tool is pressed against the surface to be treated and, as the desired degree of cleaning is reached, it gradually moves.
Another tool that will help in removing old paint is a perforator. With the help of a wide nozzle-shovel, often homemade, you can remove old paint from concrete bases by knocking it down with a perforator. Flaw this method The fact is that along with the paint, the base itself can be damaged, so this method is more suitable for removing paints from durable concrete. Together with paint, putty and plaster are well removed in this way, with → .
Another common method of mechanical cleaning of old paint is sandblasting. The principle of sandblasting is that a jet of air or water is directed to the surface to be cleaned under high pressure, into which abrasive particles are added (most often ordinary sand). Sand grains, hitting the surface at high speed, perfectly clean it not only from paint, but also from rust, from various other persistent contaminants.
The disadvantages of the sandblasting method include the relatively high cost of equipment and the need for certain skills to maintain the fixtures and produce the work itself.
Removing old paint by hand from a wooden surfaceBefore painting any surface, it is necessary to carry out preliminary preparation. It includes removing dirt, cobwebs, insects from the surface, as well as removing paint, sanding (for wood surfaces) and puttying.
The most important step is the removal of the surface coating. The left old paint contributes to the appearance of cracks, flaking of the new coating, and a violation of the aesthetic appearance. Consider the most common paint removal methods that you can use on the farm:
The use of one of the methods depends on the type of paint applied, as well as on the material of the surface to be cleaned.
The most effective method for cleaning wooden surfaces from paint and varnish is the heat treatment method. Using a building hair dryer or burner old surface heated to melting point. The paint softens and peels off, after which it is easily peeled off with a hand trowel. The advantage of this method is that even thick layers of paint can be stripped quickly and efficiently.
The processing method is only suitable for wood, and in some cases for metal. Not effective on plastic, last at high temperature starts to melt and deform. This method is of little use for the treatment of painted concrete, stone or plastered surfaces. A significant drawback is the release of volatile toxic substances when the paint is heated.
You can also remove old paint with special tools, which include chemical solvents. They are produced for the removal of a specific coating and are based on acids, alkalis and organic polar substances, such as acetone or gasoline. There are also solvents universal composition, but their efficiency is lower.
After applying the solvent to the surface, it must be left for 15-60 minutes. The time depends on the type of old paint and the thickness of the applied layer. The required time of contact with the surface must be indicated on the packaging. During this time, the old paint will begin to soften and can be easily removed with a hand trowel.
The chemical method is suitable for cleaning most surfaces:
Mechanical methods of stripping paint include cleaning using manual or electric tools. The most common tool for removing paint from large surfaces is a grinder or an angle grinder (angle grinder). If a grinder is used, instead of a disk, a special wire brush (brushing) is fixed on it. You can also use a drill with a metal nozzle. This method is suitable for stripping wood and metal from oil paints.
To clean concrete, stone, plastered walls from water-based paints use surface grinders with coarse sandpaper, with a grain size of 250-600 microns.
The manual method of removing paint with a spatula or scrapers is also referred to as mechanical methods. This process is quite long and laborious, but the most affordable. Removing the paint by hand will not give you a completely clean surface, so use it in combination with other methods, or as a final step. preparatory work. The advantage of the manual method is the ability to remove any paintwork.
Often the beginning of the repair is complicated by the presence of an old layer of paint on the walls. To continue cosmetic procedures, you should carefully study all the nuances of how to remove the old oil paint from the walls. Otherwise, further ennoblement of the premises will be impossible, and all the efforts made will turn into a series of failures.
Before you wonder how to clean the walls of paint, you need to decide whether to get rid of it completely. In most cases, the walls were covered with oil-based dyes. If the relief of the wall remains even, without chips, falling off pieces and bubbles, and further procedures are not associated, for example, with applying wallpaper or a primer, then you can paint over the old layer.
The modern dye market provides a lot of reliable options. Paints based on water, silicone or mixed with acrylic adhere well to the surface, providing a secure fit. But even using quality materials the whole overlapping process will go down the drain if the surface was uneven.
In cases where it is necessary to carry out surface leveling work using putty, removal of old paint from the walls is necessary. This fact is confirmed by the poor adhesion of primers to paint surfaces.
Oil paints are the most difficult to lag behind the surface, and therefore the technology of getting rid of them is the most time-consuming. The more layers that have been applied, the easier it will be to clean. Much also depends on the material on which the dye was placed. Removing oil paint from porous plaster will not create any special problems, but you will have to think hard about how to remove paint from concrete.
Cleaning the walls of old paint requires some preparation. First of all, to remove paint from the walls, you will need the following set of tools:
How to remove oil paint from walls? There are three ways you can remove old paint from walls. It can be removed through the use of chemical solutions, increased heat, well, or mechanical action. It remains to choose the most suitable method for removing paint from the walls, and you can proceed.
How to remove oil paint from walls? First of all, you can try chemical method, in which a special wash is used. How to remove paint from walls quickly and efficiently? Everything is much easier than it seems. You only need to apply the solution to the hated surface and go about your business.
Related article: Tips for flushing water-based paint from the ceiling
After a couple of hours, the chemical begins to act, and the paint softens. In the end, you just need to tear off the semi-soft substance. When using chemical washers, you can count on removing not only oil layers, they can also clean off acrylic paint.
But, despite the simplicity of the algorithm, this method has a number of disadvantages:
How to remove old paint without harm to health when using this method? Think safety! Work with chemical materials should be carried out only with full equipment in a respirator, goggles and gloves. Regardless of the additional protection, wash off the remnants of chemicals after the procedure.
The room must be well ventilated. Children, allergy sufferers and expectant mothers should stay away from the poisonous source.
If you are wondering how to wash off oil paint, then the modern market offers a huge range of raw materials. Some you can buy and some you can make yourself. For example, thanks to liquid glass, the old dye is removed quite quickly - it covers the desired surface, which, when dried, is covered with a thin transparent film. Together with it, they easily peel off the old paint.
If the task arises, how to remove oil paint from the walls, you can resort to a home-made method. Paint remover is easy to make and does not require a large number of components. This will require quicklime in the amount of 1.2 kilograms and half a kilogram of calcium, mixed with ordinary tap water and applied to the desired object. These components will quickly remove layers of unwanted dyes. After twelve hours, the cleaning of the old paint will go off with a bang.
How to remove old paint from walls with a thermal method? This can be done by heating the dye with a hair dryer to an amazing temperature. This method has been tested by more than one generation and will definitely not let you down.
The technology is very simple: I heated the paint with a hair dryer and took it off. Removing old oil paint will not be difficult, but it will take some time. When bubbles and bulges form on the surface under the influence of heat, the melted layer of paint is removed with a sharp spatula.
For the sake of exception, you can try using an iron through a layer of paper or newspaper. The iron is only suitable for a small thin layer, as it may not give a suitable temperature. Removing oil paint from walls with heat is great for areas near fragile materials.
Related article: What paints are suitable for painting foam?
However, this method also has its drawbacks. These include:
Don't even think about stripping lead paint off with heat! She has the highest toxicity. Vapors of such material instantly penetrate the body and cause irreparable damage.
On the video: removing old paint with a hairdryer.
How to remove old paint from walls mechanically? First you need to decide on the working tools that you have at home. This method is non-toxic, which makes it possible to clean kitchens, bathroom tiles and various indoor areas. It is divided into manual and mechanical with the use of electrically driven tools.
How to remove paint from walls manually? A method proven over the years will not require you to spend a lot of money. You just need to arm yourself with ordinary water and an ax.
First of all, serifs are applied with an ax along the plane of the paint, then it is wetted with water, which is better not to spare. Water should soak the surface for five minutes, after which the paint can be removed with an ax without any problems. They clean it with sharp movements, tilting the tool almost parallel to the wall surface.
For recesses and narrow places, as well as areas for sockets, baseboards and wires, a spatula or chisel is well suited.
Only such a tool should be wielded on a wooden surface. Since the active removal of paint will dull the tools, it is good to have sandpaper on hand, which can be used to sharpen a dull unit. The advantages include cost-effectiveness, safety (but with an ax it’s still more careful), and cleanliness. However, this is a long-term process that requires a considerable investment of physical strength.
How to remove paint from the walls in the bathroom and at the same time save your health, money and time? An electric drill or grinder will also help you with this. It should be said right away that when working with the latter, an incredible amount of dust is formed. After a minute of operation, the visibility of the room will be zero. This is very inconvenient both when working in the kitchen and in any other room. So the best tool for removing paint is a drill with nozzles, which perfectly beats off layers of paint.
The attachments can be a special chain or a grinding wheel, even better if it is framed with hard wire.
How to remove paint from the walls in the bathroom with large layers? For large buildups of paint, a nozzle with a chain is suitable, which will rotate and knock out pieces of dried paint. However, if you clear concrete tiles, this nozzle will not work, its field of work is not rough plaster.
Most universal option- grinding wheel. It is convenient for them to tear off any materials and dyes, suitable for all coatings. This method, like the one described above, will also help peel the paint off the walls in the bathroom.
How to quickly remove old paint from concrete? Concrete should be given special attention, since such a surface holds the paint best. Plus, the painter who painted such a wall, most likely, did it in good faith, hoping to put a layer of paint on for centuries.
One of the first thoughts that arises when looking at a layer of paint that needs to be removed is: “Yes, it will be the easiest to peel it off!”. And now the hands are already reaching for a grinder or a drill with grinding nozzles. We recommend not to rush and analyze the situation, because mechanical removal is not that inefficient, but it is not suitable for all products. It turns out that you can remove the paint by grinding if its layer is not thick and the surface is even, otherwise the effort spent on removing the coating will not be worth the result that you get. Sometimes for thin layers it is enough to rub the coating with a metal brush and sand it with sandpaper with a medium abrasive. If the surface area is small, then this is the best way to remove paint without special tools and substances. Quite quickly and easily, chemical washes, which are sold in hardware stores, will help to remove the old layer of paint. Only they, of course, do not wash off the paint, but rather soften it, so you still have to work with a spatula. Typically, such a product is applied to the product with a brush or roller, left, depending on the type of product and instructions - usually for 20-40 minutes, and then the softened layer is pryed off and scraped off with a spatula. If the first time it was possible to get rid of only part of the paint, then the procedure is repeated, but the smallest residues can be cleaned with sandpaper. It is important, when buying such a wash, to check with the seller or make sure for yourself that it is suitable for your type of material and paint. You can save yourself the hassle of looking for a specific washer for your type of paint by purchasing an all-purpose cleaner. Also, think in advance about whether you can leave the room for the duration of the wash and then ventilate it well or take the product outside. If yes, then you can take a regular solvent-based paint remover, if not, then it is better to give preference to more modern expensive odorless gel washes. That's just the absence of smell does not mean that they are not toxic: with any wash it is necessary to work with gloves, and the room must be ventilated. According to the experience of builders, we can say that cheap washes Russian production do not do well with old oil paint if it is applied in several layers. With more expensive foreign counterparts, this problem does not arise. If you have, then you can not spend money on special washes at all: add a little water to it, dissolve soda, and then mix with ground oatmeal to get a paste. Apply the paste to the product, wait about an hour until bubbles form, remove the paint with a spatula, and then degrease the surface. Gloves and ventilation are also relevant for this method. Do not use plastic containers and tools when working with a wash, as they may deteriorate from exposure to chemicals. Also, do not use washes if plastic is located close to the wooden product. The latter method is considered preferable for removing paint from wood, since it can be done quickly, easily, inexpensively and without harm to the product itself. It consists in heating the paint to a temperature at which it begins to correct and release gas. This will cause it to bubble, and it will be easy for you to peel off the old layer by prying these bubbles with a spatula. But what is the best way to do it? Heating with an open flame, such as a burner, is not only dangerous, but will also have questionable results. Yes, the paint will start bubbling, but fire can lead to drying out of the wood, burnt spots on the product, or poor-quality subsequent painting due to resins released during the treatment with a burner. It is better to use a hair dryer, but not a household one, but a construction one. Its heating is hundreds of times stronger, and the paint begins to lag behind the wood literally before our eyes: just have time to pry it with a spatula. Of course, it’s scary for an inexperienced person to work with such a hair dryer: if you accidentally point a stream of hot air at yourself, the case will 100% end in a hospital. But subject to all security measures, this method beats all the others! If you have a person willing to lend you a blow dryer for a day. Strong heating, as well as chemical processing, is not allowed if the product has plastic parts that cannot be dismantled. Also, do not heat the wall with a hair dryer in areas where the wiring passes, as this can lead to damage to it. Yes, it is often necessary to remove the old layer of paint, especially when the paint has begun to crack and peel off or when the surface has become very uneven and bumpy due to the multi-layering. But you don't have to go through the long and complicated process of stripping paint by choosing to cover with a new coat on top of the old one. The surface will have to be prepared: the oil paint must be sanded, removing the bumps, then washed with an alkaline solution, such as soap, primed with an alkyd or synthetic primer, and then apply a new layer. If after grinding the surface is still not leveled, the product can be puttied before priming. If you want a translucent effect with a translucent wood texture, then the paint will have to be removed, even if painting a new layer on top of it is quite possible. You will need some skill in removing paint from wood, but once you figure it out once, you can easily repeat the procedure if necessary. How exactly you will remove the coating is up to you, but, you see, now you have plenty to choose from. mechanical method
Chemical method
thermal method
Or maybe not remove the old layer at all?
Thematic materials:
