(1) Clean up the rust on the surface first, and spray it with self-spraying varnish once to prevent rust, or remove it and take it for electroplating and painting.
(2) Remember to check frequently to see if there is a similar situation.
(3) If there is slight decay, gas welding can be selected for repair. If the corrosion is serious, please replace it.
The traditional car body panel painting process generally requires the following processes:
1. Sheet metal correction is the preliminary plastic work of automotive sheet metal painting.
Second, after scraping (molding) the body sheet metal is corrected, there are still some defects that the sheet metal work can't make up. Even if new parts are replaced, there will be imperfect centers. In order to be more perfect and accurate, it is necessary to use sculpture technology to make up for the defects.
Third, automotive sheet metal painting: automotive sheet metal painting is usually divided into three steps.
<1> Primer: it fills sand marks and micropores at the bottom of the workpiece, increases the adhesion of the lower coating, and has the function of defect indication. -
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< 3 > topcoat: topcoat is divided into single-layer paint and multi-layer paint, which is a color fixing layer and a decorative maintenance layer.
Four. Surface treatment of sheet metal and painting: The surface treatment of painting is the last process of finishing paint. When the paint surface is dry, the above defects will be removed, and if we try our best, it will flow to the center of a department that is not very satisfied. As long as it is supplemented later, we call it mirror treatment. First, use 1200-2000 mesh beauty sandpaper (2500 mesh if necessary) to stop leveling and polishing, then use coarse wax composed of pumice or clay to stop polishing and cutting, and dispose of traces of sandpaper.
Five: Next, stop polishing "silicon-free" with fine wax, get rid of traces of coarse wax, then treat it with repairing agent to achieve perfect luster, and then completely remove halos and scratches with mirror treatment agent. Sheet metal painting is a multi-process maintenance project with high technical requirements.