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 around the edge of the inside surface with a 50/50 mixture of isopropyl alcohol and water by volume on a dampened lint free cloth.
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 manufacturers 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, in order to provide a uniform surface for sanding, such as Sikkens® Polystop LP, or equivalent.



13. Finish sanding with a dual action random orbital sander.
14. Prime and refinish as necessary. Refer to the GM Approved Refinish Materials book GM P/N GM4901M-D which identifies the paint systems you may use. Always refer to the latest revision of the 4901M-D book. This operation is to be performed prior to the application of sealers, waxes, deadeners, and antirust compounds. Follow the procedures recommended by the material manufacturer.