In the process of repairing car paint, sometimes there is a phenomenon that the paint film is full of luster before drying, but the luster gradually fades after drying or the next day. What is usually caused by this phenomenon? Guangzhou automotive paint manufacturers simply analyze the reasons as follows:
1. The primer has poor adhesion, or the primer is not fully cured before spraying the topcoat on it;
2. The proportion of paint mixing is not correct, such as insufficient curing agent, or too much thinner;
3. The quality of the thinner or curing agent used in the paint is too poor, or unsuitable products are used;
4. Improper spraying method;
5. The temperature is too high or too low, causing the drying speed to be too slow, solvent evaporation and vehicle exhaust invading the surface of the paint film;
6. The surface of the paint film is not cleaned;
7. A strong cleaner was used on a freshly sprayed paint film, or it was polished too early
Based on the above reasons, it is recommended to:
1. Use a qualified primer, and need to wait for the primer to fully dry before applying the topcoat layer;
2. It is recommended to use the matching products from the same manufacturer, and the spraying effect will be better;
3. Mix and fully stir according to the technical data sheet from the manufacturer;
4. Use the correct spraying method;
5. Before spraying, it is necessary to clean thoroughly and make sure the surface of the sbstrate and paint film, and dry the cleaner with a dry cloth;
6. Ensure that the environmental conditions meet the requirements of spraying;
7. Do not use strong cleaners on the surface of the newly sprayed paint film, and do not polish until the paint film is fully cured.
