How long does it take to spray paint in automotive sheet metal? It may take 5 to 7 days to finish if it is a large area of body panel painting. If it is a small area of sheet metal and painting, it will take about 2 to 3 days to complete. When repairing sheet metal and paint, be sure to go to a professional store. Don't go to some shops with poor skills for the sake of cheap.

The paint on the car body is actually very complicated. The paint surface of automobile body consists of four layers, namely electrophoresis layer, intermediate coating layer, color paint layer and varnish layer from inside to outside.

The electrophoretic layer is used to prevent rust. After the whole assembly is completed, the whole body will be immersed in the electric swimming pool, so that an electrophoretic layer can be formed on the whole body surface.

Above the electrophoretic layer is an intermediate coating, which is mainly used for rust prevention and can also improve the adhesion with the next layer of body paint.

Above the intermediate coating is a colored paint layer, which mainly plays an aesthetic role. All kinds of body painting that we can usually see are presented through colored paint layers.

The outermost layer of paint is varnish layer, which mainly plays the role of protecting colored paint layer and can also improve the gloss of car body paint surface.

The varnish layer is the most fragile layer of the car body paint surface, and most of the small scratches are left on the varnish layer.

The scratches on the varnish layer can be removed by polishing, but it is not recommended that you polish it frequently.

What is the process of painting in automotive sheet metal?

1, determine the scheme:

Before painting, the maintenance master needs to determine the maintenance plan according to the damage degree of the vehicle, and different solutions will be taken to different degrees.

2, sheet metal forming:

Cutting, grinding, stretching, fire extinguishing and deoxidation are adopted for the deformed part. You should know that sheet metal is not only to restore the original appearance of the vehicle, but also to maintain the hardness of the metal material as much as possible.

3. Scraping and shaping:

After the sheet metal is corrected, the maintenance master will reshape the waistline of the car body and adjust its flatness by scraping and reshaping the car body.

4. Painting:

The paint spraying process is complex, which requires spraying the first primer, intermediate primer, paint mixing, topcoat spraying, paint drying and other processes, and must be carried out in a dust-free environment.

5, paint surface treatment:

Although it has been painted, there will still be minor flaws, so the repair union will use extremely fine beauty sandpaper or polish it with a polishing machine to restore the luster of the car body. (Photo/Text/Photo: Ask and Answer Animals) @20 19