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How can you fix spider cracks in a fiberglass hood?
I installed a fiberglass hood on my car a few years ago, and I’ve recently noticed a few spider cracks starting. What’s the best way to fix spider cracks in the hood of my car?
Jack Walsh · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Installing a fiberglass hood on your car is a common modification to alter the appearance of your vehicle and drop some weight, but they are prone to spider cracks. Fortunately, spider cracks in a fiberglass hood aren’t difficult to repair, but it will require a fair amount of free time.
To fix spider cracks in a fiberglass hood, you will need:
- Clean rags
- Acetone
- Sandpaper of varying grit
- Masking tape
- Plastic coverings
- Gelcoat
- Paintbrush
- Polyvinyl alcohol
Once you have your supplies, you should:
- Clean the area using acetone and a clean rag.
- Roughen the surface using 100-grit sandpaper and wash again with acetone to remove particles from sanding.
- Protect the area surrounding the cracks using masking tape and plastic.
- Prepare your gelcoat using the included instructions. Then apply a thin layer to the affected area using a paintbrush.
- Allow the gelcoat to rest for three hours and then spray lightly with polyvinyl alcohol to help the curing process.
- Let the gelcoat cure for 24 hours and then wash the area with soapy water.
- Smooth the surface starting with 300-grit sandpaper, then 600-grit, then 900-grit until you reach your desired finish.
- Clean the area with acetone and paint the area if necessary.
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Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.
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