Undercoating
Undercoating1. Masking
Mask the area surrounding the damage to protect it from the primer surfacer overspray.
Use masking tape and paper.
2. Spraying primer surfacer
- Spray the primer surfacer over a wider area than the body filler and the exposed surface of the paint film.
- Spray 2-3 coats to get 30 microns of thickness.
- Use the 2-part urethane primer surfacer and a spray gun.
- Mix the primer surfacer with the additive and solvent, and in the correct ratio.
- Follow the primer surfacer manufacturer's instructions.
3. Drying
After spraying primer surfacer, allow for 5-10 minutes of normal drying time, then force dry it with infrared lamps or other industrial dryer.
NOTE: Follow the primer surfacer manufacturer's instruction for drying time.
4. Polishing
Check that the primer surfacer has dried thoroughly, then sand the primer surfacer.
Use the double action sander and #320-#400-#600 disc papers.
5. Air blowing /degreasing
Use alcohol, and wax and grease remover.
Also clean and degrease the surfaces where masking tape will be attached.