How do I fix rust holes in my car using fiberglass?

How should I go about fixing rust holes in my Trans Am with fiberglass? I’m fixing up a 1979 Pontiac Trans Am, and I need to get rid of some rusty areas. I’ve read that you can use fiberglass to fix rusty spots.

Answer
Rust can be a pain, especially on otherwise sleek cars! But try not to worry. Repairing rust spots with fiberglass is fairly easy when you know what you’re doing. But if you’re a beginner, follow these steps to get it done:
  • Use a surface sander to remove the rust using 80-grit sandpaper—wear a respirator.
  • Make sure you sand it down to the metal (use a die grinder if needed).
  • Remove any particularly resistant rust with a chemical rust remover, then let it dry.
  • Sand the rusty spot again with low grit sandpaper to scuff up the surface. This will allow the fiberglass to bond more easily to the car.
  • Mix together your fiberglass paste and a resin hardener.
  • Quickly apply it to the surface of your car until it’s about even with the surrounding area.
  • Let it dry.
  • Sand the resin until it matches the contours of the vehicle.
  • Apply new layers of resin and sand them down as needed.
  • Once the repaired area matches the surrounding area, sand it with a fine-grit sandpaper.
  • Paint the sanded area.
Congratulations, you just successfully repaired rusted areas on your Trans Am! Remember, you’ll need to insure your car before you get it on the road. And **classic car coverage can be expensive.
To make sure you’re getting the best rate on the coverage you want, try Jerry. A licensed broker, the Jerry app can help you find and compare quotes from over 50 top providers in minutes. Jerry can even send you new quotes when your policy comes up for renewal—so you always know you’re getting the best rate.
Eric Schad
Answered on Nov 08, 2021
Eric Schad has been a freelance writer for nearly a decade, as well as an SEO specialist and editor for the past five years. Before getting behind the keyboard, he worked in the finance and music industries (the perfect combo). With a wide array of professional and personal experiences, he’s developed a knack for tone and branding across many different verticals. Away from the computer, Schad is a blues guitar shredder, crazed sports fan, and always down for a spontaneous trip anywhere around the globe.
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