Regarding the 8 suggestions for paint, don't be fooled by "paint"!

Paint, almost always used in home decoration, but there will be a variety of problems in the decoration, today Xiaobian will bring everyone to paint the eight sins of the paint, do not be fooled by "paint"!

1, paint peeling off

If the original paint is lacquered or powdery, the new paint will not stick to the surface. Or it may be wood decay or metal rust spots, but also peeling off due to poor paint quality.

[Solution] A small area of ​​paint peeling off, first sanded with fine sandpaper, then put on putty, brush the primer, and then repaint. Large areas of peeling must be scraped off and repainted.

2, paint blistering

In one case, moisture is infiltrated under or behind the paint layer, and when the sun is exposed to the sun, the water evaporates into a vapor, and the patent leather is foamed. In the second case, the wood grain may be cracked, and there is a small amount of air inside. After the sun is shining, the air expands and the patent leather bulges.

[Solution] In the case of the former water, the foaming paint can be removed by a hot air spray gun, the wood is naturally dried, then the primer is applied, and finally the entire repair surface is repainted. In the case of the latter without water, first scrape off the foamed patent leather, then fill the crack with a resin filler, repaint, or use no filler, and directly apply the microporous paint after scraping off the patent leather.

3, cracks appear

Fine cracks appear on the surface of the paint. Most of the reasons are the use of mutually incompatible paints. The coefficient of expansion of the upper layer and the bottom is different.

[Solution] In most cases, the paint should be removed with a chemical paint remover or a hot air spray gun before repainting. If the fracture range is not large, you can use sanding block or wet and dry sandpaper to wet the water, grind off the broken paint, after the surface is smoothed, put on the putty, brush the primer, and repaint.

4, the production of stains

There are many reasons for stains on the paint surface. For example, the water in the latex paint dissolves the material on the wall and rusts the paint surface. The wall surface rubbed with steel wool will produce rust spots, and the dark pipe in the wall will leak and appear stains.

[Solution] To prevent stains, first apply a primer containing aluminum powder. If stains have appeared, remove the latex paint from the stain, brush the primer containing aluminum powder, and then repaint. .

5, loss of luster

The reason is that the primer is not applied, or the primer and the inner layer paint are not dried, and the varnish is directly applied. As a result, the varnish is absorbed by the wood and loses its luster. The poor quality of varnish is also a cause.

[Solution] Use old wet and dry sandpaper to rub off the old paint, brush off the polished dust, wipe the surface with a clean damp cloth, and then dry it again, then repaint the paint. It is important to note that painting in a very low temperature environment may also result in loss of gloss after the film has dried.

6. Dark spots appear on the surface of painted wood

This may happen because the knots are not sealed before painting, and the sun is exposed to the sun, the knots are heated, and the resin is exuded from the knots.

[Solution] At this time, the paint can be scraped off with a scraper, and then polished with fine sandpaper to expose the knots, and the knots are sealed with a seal paint. After drying, repaint.

7, paint film wrinkles

Usually caused by brushing the second time after the first time the paint is not dry. At this time, the solvent in the undercoat affects the upper paint film and wrinkles it.

[Solution] In this case, the creased paint film can be removed by chemical mercury removal or heating to repaint. Remember, you must wait until the first time the paint has dried out before you can go to the second time.

8, the paint is rough

The newly painted surface is rough, usually because the paint brush used is not clean or contaminated by the surrounding environment. It is also possible that the paint is mixed with patent leather, which has not been precipitated and filtered before use, or that the paint is dusty when it is not dry.

[Solution] In order to prevent the above problems, a clean paint brush and paint bucket must be used. Always filter before using old paint. In addition, the surface should be covered with a cover or cardboard when the paint is not dry. If the paint surface is rough, after it has dried out, smooth it with a dry and wet sandpaper, wipe it off, and then paint again. Pay special attention to the paint brush must be clean.

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