When there is a need for paintingmetal object must first remove rust and old coating. It does not make any sense to apply over the already existing old paint, otherwise a fresh layer will begin to peel off. In this regard, a logical question arises: how to remove the old paint from metal? You will find the answer in this article.
This process is quite long, sinceit will be difficult to quickly remove old paint from metal. There are several different options for this: professional and amateur. For removal will require the following materials:
- special fluid;
- putty knife;
- heat gun;
- grinder;
- kerosene.
Options for removing the old layer of metal products
If necessary, upgrade the metalcoatings on which several layers of paint do not need to expect that the process will be easy, as it is not easy to remove old paint from metal, because manufacturers are trying to ensure that their goods are durable and remain in normal form for a long time.
Ways to remove unwanted layer:
- mechanical;
- thermal;
- chemical.
How and the better to remove the old paint from metal?It is most practical to do this with a special liquid. In order to understand this, it is worth exploring each of the paint removal strips listed below.
Mechanical method
With manual or power tool removalcan be done with it. Wire brushes or ordinary sandpaper - not the best option, but still effective. It is more expedient to use the grinder for this, she uses a wire brush as a nozzle. Or a drill with a metal brush mounted in the chuck is suitable. But this is not a very convenient method. Its advantages are in the availability and simplicity of processing a small area, since removing old paint from metal at home on a large area is a job that requires tremendous effort.
Thermal method
When using this method, coatingheats up until the paint begins to peel off. After that, she removes the spatula. Unfortunately, not all products made of metal lend themselves well to this treatment option. This method is not at all suitable for sheet iron, cast iron, galvanized sheets.
The advantage of this option is saving timeas it is harder and longer to remove very old paint from metal with other improvised means and materials. Its disadvantage is fire hazard. Dross appears on the surface, requiring sanding. Such a rather gross removal does not always give the desired result. It is preferable for these purposes to apply other options for removing paint.
Chemical method
How can you remove the old paint from the metal yet?Washes and solvents. Buy a special liquid is not difficult, since they produce a lot of enterprises. Therefore, in the market you can see different means.
Each liquid has a certain specificity, therefore, it is first necessary to read the manufacturer's instructions. The consistency of the fluid may vary - it may be:
- gel and liquid;
- dry powder;
- spray can.
But in practice it is more difficult to choose not the type of wash, but its manufacturer, because the level of quality does not always meet expectations.
The undeniable advantage of this optionis simplicity, since it is possible to remove the old paint from metal almost without much effort after the completion of the chemical process. But there is a negative side to this method - toxicity.
Washing technology
The process of applying a liquid elementary.To remove a paint and varnish covering from a metal product, it is necessary to put substance and to leave it for a specific period. The validity period must be written on the package. It is important to observe the time, since removing the old paint from the metal will not work if the remover has not worked properly. It is necessary to give preference to qualitative compositions, since with cheap analogues it will be more difficult to carry out the removal. Some argue that it is more practical to apply the gel, because it is easier to apply it evenly.
To use the paint remover, you need to prepare:
- Wash.
- Protective gloves.
- A respirator is required to protect the airways against toxins.
- Certain types of sandpaper.
- Handy trowel.
Do not forget that when there are several layers of old paint, you will need another surface treatment.
When the chemical reaction is over, the enamelswells and flakes. To remove this, you need to carefully walk with a sander, sandpaper or spatula and remove the paint. All actions are not carried out in a hurry, otherwise you can damage the foundation. After cleaning, the product should be coated with an anti-corrosion agent. After that, you can proceed to the selection of new paint to refresh the surface of metal products.
Errors when painting the product
Нередко люди, не осведомленные в этом вопросе, make a gross mistake and choose a simple solution: carry out painting without first cleaning the surface. However, they assume that this is the best option. But then they realize that the decision was wrong. And such a venture takes only time and effort. A positive result will not be observed for long, after some time the applied fresh paint will swell up, will peel off and fall off in large pieces.
Therefore, before painting it is important to follow a certain sequence of actions:
- you must first remove all old coverage completely;
- degrease the surface;
- to process a primer.
When the preparatory work is completed, you can apply a fresh coat of paint.
Now you know how to remove old paint frommetal. Obviously, this is a very hard work. After all, it is necessary not only to remove the old paint, but also not to damage the product itself, and this will take time, certain skills and, of course, patience!
