Paint is almost always used in home renovations. First, the color of different colors makes the whole room colorful. The second is to paint it with anti-corrosion and waterproof function, can apply a protective film to the wall or household items. However, the use of paint in the decoration will also produce a variety of problems, today Xiaobian will bring everyone to inventory the eight sins of paint, and then provide solutions for you, do not be fooled by "paint"!
First sin
Peeling paint
One possibility is that the surface is too smooth. If the original paint is lacquered or powdery (with an untreated paste coating), 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.
ã€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.
Second sin
Paint blistering
The bubble is broken. In one case, water is emitted, which means that there is moisture infiltration under the paint layer or behind the sun. When the sun evaporates and the water evaporates into steam, the patent leather will be foamed. In the second case, there is no water in the bubble. It may be that the wood grain is cracked and there is a small amount of air inside. After the sun is shining, the air expands and the patent leather bulges.
ã€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.
The third sin
Crack
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.
ã€solution】
In this case, it is mostly necessary to remove the paint 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.
4th sin
Produce 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.
ã€solution】
To prevent stains, first apply a primer containing aluminum powder. If stains have appeared, remove the latex paint from the stains, brush the primer containing aluminum powder, and then repaint.
5th sin
Lost gloss
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.
ã€solution】
Use old wet and dry sandpaper to rub off the old paint, brush off the dust, wipe the surface with a clean damp cloth, and then dry it again. 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.
Sixth sin
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.
ã€solution】
At this point, the paint can be scraped off with a spatula, and then polished to a wooden knot with a fine sandpaper, and the knot is sealed with a seal paint, and then repainted after drying.
The seventh sin
Paint film wrinkling
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.
ã€solution】
In this case, the creped 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.
8th sin
Paint 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 with paint filter paper or clean nylon stockings before using the old paint. In addition, the painted surface should be covered with a cover or cardboard when the paint is not dry to prevent dust. 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.
The above is the eight sins of paint. The owners of the decoration should pay attention to it. With a clear understanding of the solutions to these eight problems, you no longer have to worry about painting problems.
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