How to Repair Rust Holes in Car Body
Materials you will need:
- Sandpaper (80-grit, 120-grit, 220-grit)
- Wire brush
- Rust converter
- Fiberglass mat
- Resin
- Bondo
- Primer
- Paint
- Clear coat
Steps:
1. Prepare the surface
Start by sanding the area around the rust hole with 80-grit sandpaper. This will remove any loose paint or rust. Once the area is sanded, use a wire brush to remove any remaining rust.
2. Apply rust converter
Once the surface is clean, apply a rust converter to the area. This will help to stop the rust from spreading. Allow the rust converter to dry according to the manufacturer’s instructions.
3. Cut fiberglass mat
Cut a piece of fiberglass mat that is slightly larger than the rust hole. Apply resin to the back of the fiberglass mat and then place it over the rust hole. Smooth out the fiberglass mat with a roller or squeegee to remove any air bubbles.
4. Apply more resin
Apply more resin over the fiberglass mat. Use a brush or roller to work the resin into the mat. Allow the resin to dry according to the manufacturer’s instructions.
5. Sand the surface
Once the resin is dry, sand the surface with 120-grit sandpaper. This will smooth out the surface and remove any excess resin.
6. Apply Bondo
Apply a layer of Bondo over the sanded surface. Use a putty knife to spread the Bondo evenly. Allow the Bondo to dry according to the manufacturer’s instructions.
7. Sand the surface again
Once the Bondo is dry, sand the surface with 220-grit sandpaper. This will smooth out the surface and remove any excess Bondo.
8. Prime the surface
Apply a coat of primer to the repaired area. This will help to protect the surface from rust and ensure that the paint adheres properly.
9. Paint the surface
Once the primer is dry, apply a coat of paint to the repaired area. Use a brush or spray gun to apply the paint. Allow the paint to dry according to the manufacturer’s instructions.
10. Apply clear coat
Once the paint is dry, apply a coat of clear coat to the repaired area. This will help to protect the paint from the elements.
Tips:
- If the rust hole is large, you may need to use a metal patch to repair it. Metal patches are available at most auto parts stores.
- Be sure to wear gloves and a mask when working with fiberglass and resin.
- Allow each step of the repair process to dry completely before moving on to the next step.
- If you are not comfortable repairing rust holes yourself, you can take your car to a body shop for professional repair.
Conclusion
Rust holes can be a serious problem, but they can be repaired with a little time and effort. By following the steps outlined in this article, you can repair rust holes in your car body and restore your car to its former glory.
