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Illness 1: Cracking and shedding of the coating
Cause: The coating showed cracks like hair filaments in the early stages and exfoliated in the later stages. Most of them used coatings with poor adhesion and flexibility, excessive dilution or coating materials, and the surface of the wall or base was not pretreated. Full, excessive hardening and embrittlement after film aging.
Recommendation: Remove loose and peeling paint with a spatula or wire brush, sand the surface and trim. If spalling occurs on multiple coats, water-resistant putty should be used if necessary.
The primer must be closed before recoating. The use of good quality primers and topcoats can prevent the recurrence of such problems. Do not over-dilute the paint with water.
Illness 2: Mildew
Cause: Black, gray, or brown spots appear on the surface of the paint or wall surface where moisture, light or light are not in direct contact (such as baths, kitchens, laundry rooms, etc.). Before the use of inferior emulsion paint or coating, the substrate or the coating on the coating was not cleaned.
Recommendation: Place a few drops of household bleach in the area of ​​discoloration to detect the presence of mold. If the stain disappears, it may indicate mold. Wipe the surface with a diluted household bleach solution (one part bleach to three parts water) to completely remove the mold. Rinse thoroughly with rubber gloves and goggles while working. To avoid mildew on the walls, use a regular manufacturer's high-quality latex paint. If necessary, use a bleach/detergent solution to clean the substrate. Consider installing the exhaust fan in a high-humidity area.
Illness 3: Coat wrinkles
Cause: When the paint is applied, the paint is thick at one time and the surface of the paint film becomes rough and wrinkled. Brushing in very hot or cold weather causes the surface of the paint film to dry faster than the bottom layer, exposing the uncured coating film to an excessively humid environment, and brushing the contaminated surface (if dust or oil is present) Thing).
Recommendation: Wipe or polish the surface of the substrate to remove the wrinkled coating. If you apply a primer, make sure the primer is completely dry before applying the top coat. When brushing again (to avoid extreme temperatures and humidity), apply a uniform layer of high-quality interior paint.
Illness 4: Yellowing of the coating
Cause: Ordinary paints are often exposed to sunlight. After coming from above the furnace, heating, heating pipes, or other materials, yellowing is likely to occur. This is due to UV aging and oxidation of other substances.
Recommendation: For strong sunlight or vulnerable areas, it is recommended to use high-quality anti-aging, light-resistant latex paint for decoration.
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