Common problems and solutions in coating construct

2022-07-22
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1. Paint flowing

painting too thick at one time will cause flowing. Use a brush to open the paint before it is dry. If the paint has begun to dry, wait until it is completely dry, polish the paint surface with fine sandpaper, brush the surface clean, wipe it with a wet cloth, and then apply the outer paint again. Be careful not to brush it too thick

2. Stains

there are many reasons for stains on the paint surface. For example, the water in the emulsion paint dissolves the materials on the wall and rusts out of the paint surface, the wall surface wiped with steel wool will produce rust spots, and the hidden pipe leakage in the wall will produce stains, etc. To prevent stains, you can brush a layer of primer containing aluminum powder first. If there are stains, you can remove the emulsion paint at the stains first, brush a layer of primer containing aluminum powder, and then paint again

3. Mildew and discoloration

this problem often occurs on wet paint surfaces. For example, water vapor condenses on glass or metal surfaces and often produces brownish black stains. At this time, you can use fungicide to treat the moldy parts according to the instructions of the manual. After the mold is killed, clean the surface, and then paint again

4. Gloss loss

the reason is that the gloss paint is directly applied without primer, or the primer and inner paint are not dry. As a result, the gloss paint is absorbed by wood and loses gloss. The poor quality of gloss paint is also a reason

grind off the old paint with dry and wet sandpaper, brush off the grinding dust, wipe the surface with a clean wet cloth, and brush the top paint again after it is completely dry. Special attention should be paid to that when painting in a low temperature environment, the paint film may also lose luster after drying

5. Wrinkle of paint film

is often caused by brushing the second time before the first paint is dry. At this time, the solvent in the lower paint will affect the upper paint film and wrinkle it. In this case, chemical mercury remover or heating method can be used to remove the wrinkled paint film and repaint. Remember, you must wait until the first coat of paint dries out before you apply it again

6. Rough paint surface

the newly painted surface is rough, usually because the paint brush used is not clean or polluted by the surrounding environment. It may also be that the paint is mixed with paint skin, which has not been precipitated and filtered before use, or the paint is stained with dust when it is not dry

in order to prevent the above problems, clean paint brushes and buckets must be used. Before using the old paint, be sure to filter it with paint filter paper or clean nylon stockings. In addition, the painted surface should be covered with a cover or cardboard before the paint is dry to prevent dust. If the paint surface is rough, after it is completely dry, polish it with dry and wet sandpaper, wipe it clean, and then brush the paint again. Pay special attention that the paint brush must be clean

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