What are the precautions for painting sheet metal parts of electric vehicles?

1. Types of paint for automotive sheet metal parts:

• 1. Ordinary paint is a simple and common car paint. It is characterized by low cost and simple process, but its gloss is not very good, the surface hardness is not high, and it is particularly easy to scratch. Therefore, although this type of paint has an advantage in price, it is rarely used on cars, and most of them are used on trucks and passenger cars.
• 2. Metallic paint, also known as metallic flash paint, is a popular automotive finish. Metallic paint is added aluminum powder on the basis of ordinary paint, and a layer of varnish is added to protect it, so it looks very bright after completion. The biggest feature of metallic paint is not only high brightness, but also its hardness is much higher than that of ordinary paint, and it is not easy to scrape it off by ordinary objects, so cars, especially high-end cars, basically use metallic paint.
• 3. Pearlescent paint, also known as mica paint, is also a popular automotive finish. Its principle is basically the same as that of metallic paint. Pearlescent paint gives people a novel, colorful and dazzling feeling.

2, paint treatment

Paint surface treatment is the next process after the topcoat. For the paint surface treatment of electric vehicle sheet metal spray paint, there will be a slight fish scale phenomenon for some electric vehicle loading paint, which is caused by the drying time difference of the paint film during the leveling process. Natural phenomena are generally difficult for us to detect. If we want to deceive the eyes of experts, we can only carry out paint treatment, which we usually call “mirror treatment”. Leveling and grinding with cosmetic sandpaper, then grinding and cutting with coarse wax composed of pumice or terracotta components to remove traces of sandpaper, the next step is grinding with fine-cut wax to remove traces of coarse wax, and then treated with reducing agent to achieve Perfect gloss, and then use the mirror treatment agent to completely remove the halo and smears. At this time, the paint can achieve a deep gloss, and the next process is to seal the glaze, so that the perfect paint effect can be achieved.