For 1990-2009 cars

When the fiberglass laminate is not pierced through or the damage extensive, the damaged area can be repaired using the following procedure:

1. Clean and inspect the damaged area. Refer to General Plastic Repair .
2. Finish the cleanup using a tack rag and air.
3. Sand the damaged area down to the fiberglass laminate.

Use a sander with a vacuum attachment in order to minimize dust.

4. Grind or file the edges of the damaged area in order to form a dish.

The side of the dish should have a pitch for a maximum bonding surface.

5. Scuff sand the area surrounding the damaged area in order to provide a good bonding surface.
6. Clean the repair area again using a water based wax and grease remover.
7. Finish the cleanup using a tack rag and air.
8. Mix the recommended repair material. Refer to Flexible Plastic Part Repair Materials or Rigid Plastic Part Repair Materials .
9. Apply the repair material to the damaged area until the repair is slightly higher than the surrounding area.
10. Cure the repair material. Follow the manufacturer's recommendations.
11. Rough out the surface using a #80 grit disc on a D A sander or a curved-tooth body file.
12. Apply a polyester type material, to provide a uniform surface for sanding, such as Silkens Polystop LP, or equivalent.
13. Finish sand with a dual action random orbital sander.
14. Prime and refinish as necessary. Refer to GM 4901 M-D for a listing of approved materials. Follow the procedures recommended by the material manufacture.