2. Spray epoxy primer on metal plate parts.

3. Scrape the putty three times, and each time you need to polish it with sandpaper.

4. Scrape the surface of the treated putty with red ash and smooth it with 600 # sandpaper.

5. Spray 1K indicative gray primer, re-polish the unsatisfactory part, and then grind off the gray primer.

6. Stick the newspaper with tape paper and cover the parts that are not drawn.

7. Prepare the top coat and set the fan of the spray gun for spraying.