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I don’t have enough foundation in high school to learn technology. I want to know what sheet metal is?

Sheet metal spray painting is a car restoration technology. It repairs the deformed part of the car's metal shell to restore it to its original shape. Then, special paint is sprayed to make the surface of the metal shell in the restored part as bright as the other intact parts.

After the car body has been corrected by sheet metal, there are still some defects that cannot be compensated for by sheet metal work. Even if new parts are replaced, there will be imperfections. In order to be more perfect and precise, you must use The craftsmanship of sculpture makes up for defects. After a car is deformed or damaged due to other reasons, its flatness, wheel angles and lines need to be filled with scraping dust to grind out every part. Use this formula to explain: scraping dust = restoring the body. Skin = mold product = mold processing procedure. Any body skin of a car is stamped by a mold. Repairing the body skin is the same as repairing the mold.

We usually divide car sheet metal spray painting into 3 steps:

<1> Primer

Fill the sand marks and micropores on the bottom layer of the workpiece, increase the adhesion of the lower paint, and also serve as a defect indicator.

<2>Intermediate primer

A very important coating part, prepare a complete and smooth working surface for the topcoat, complete the last step of all primer work, add The adhesion of the intervening layer and a certain isolation effect ensure the quality stability of the topcoat.

<3> Topcoat

Topcoat is divided into single-layer paint and multi-layer paint. It is the color determining layer and decorative protective layer. Single-layer paint is commonly called plain paint. , also called ordinary paint, can be finished in one layer.