| HPCOBRA |
05-17-2010 07:58 PM |
Fiberglass spider cracks (crazed lines)
I have a CR that was built back in 95 and got spun into a ditch. It ended up with minimal fiberglass damage up front. The car is still in primer. I have some cracked fiberglass around the bottom air inlet and some spider cracks on the fender under the parking/directional lights. The cracked or small broken piece I am okay with fixing. The spider cracks (craze lines) I am struggling with. I will back up that area with cloth and resin to reinforce it, but how do I cover/bond the spider cracks? Years ago there was a liquid you could spray on a corvette that capillary action would draw it into the cracks. It was like a water consistency and when cured you would wet sand it. I can not find anything like it around today. Does anybody have processes to fix these fine line cracks? thanks
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| Barnsnake |
05-17-2010 08:53 PM |
The fiberglass flexed more that the less resilient gelcoat could handle. The best bet would be to grind them out, verify that the fiberglass is not cracked as well, then fill them. It might be a good idea to put another layer of glass behind those areas as well. Simply filling those crazes with some thin filler or spot putty would leave a risk that they will reappear through the paint at some point in the future.
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| Ronbo |
05-17-2010 10:20 PM |
Remove the gelcoat, three good heavy coats of Dupont 2-part epoxy primer. No cracks in 10+ years on my Corvette. Always use vinyl ester fillers not polyester (cheap crap like Bondo). The polyester shrinks over about 6 months (found this out the hard way).
Also make sure everything, and I mean everything, is isolation mounted with rubber. (mirrors, emblems, ect)
Gel coat sucks.
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