Automotive sheet metal spray painting is a kind of automobile repair technology. It is mainly used for repairing the deformed part of automobile metal shell. For example, if the car body shell is knocked out of a pit, it can be restored to its original state by sheet metal, and then the deformed car metal surface can be restored to its original state and bright as before by spraying special paint. The basic process of painting in automotive sheet metal is usually divided into four steps: 1. According to the severity of vehicle collision, make the corresponding maintenance plan. If the engine, gearbox, circuit and other serious parts are involved, it needs the personnel of the machine maintenance department to dismantle and repair them. 2. Sheet metal correction is the preliminary plastic work of painting in automotive sheet metal. The twisted body needs to be supplemented and corrected. In order to be more perfect and accurate, it is necessary to scrape the sheet metal after correction and repair the defects by carving. 3. automotive sheet metal painting is usually divided into three steps. The first primer is used to fill the sand marks and micropores of the lower coating. The intermediate primer increases the adhesion of the intermediate layer, has a certain isolation effect, and ensures the quality stability of the top coat. Topcoat is the color-determining layer and decorative protective layer, which is divided into single-layer paint and multi-layer paint. Silver powder series paint and pearlescent series paint adopt different spraying processes. 4. In the final step of paint surface treatment and painting, after the paint surface is dried and solidified, the defects on it are treated. Leveling and polishing with sandpaper, then polishing with coarse wax composed of pumice or clay, polishing with fine wax to remove traces of coarse wax, and finally treating with reducing agent to achieve perfect luster. The above is the basic process of painting in automotive sheet metal. If you want to know more, you can continue to check other articles of the car maintenance technology network.