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Old 01-03-2006, 05:35 PM
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fiberglass over epoxy??

Had our A body blasted and coated with epoxy primer in and out. Knew I would need to do body work (bondo) over the chop welds and such, but it came back with a few "areas" of pin holes. Not enough to cut and weld, but I have a thing about using bondo to fill holes, even tiny ones. I'm considering using fiberglass (with cloth) to fill the holes from the inside of the body.
(none of the holes are bigger than a pin head and each "area" is less than 6 inches by 6 inches and there are not enough holes to affect structural strenght, but I think glass would be more moisture resistant)
Is there any problem with glass over epoxy? glass inside and bondo outside?
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Old 01-03-2006, 06:00 PM
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I've applyed fiberglass filler over epoxy. I don't see why there would be a problem, but I wouldn't want to steer you wrong, so hopefully others will chime in. bodyfiller has polyester resin in it, just like fiberglass filler, or your mat which you wet out with polyester resin and liquid harden, or and EPOXY based resin. The only difference would be what the filler materials are in, plastic filler uses talc, the fiberglass filler has glass strands mixed in with it, and the mat is glass, wetted by resin. By this reasoning it leads me to believe it would be okay to do.
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Old 01-04-2006, 06:53 AM
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If the rust is gone it'll sork just fine, if the epoxy is more than a few days old scuff it up with a red scotchbrite before your fiberglass work. I'd Skim the outside of the panel with a thin layer of Everglass. Scuff the cured glass on the inside and apply two more coats of epoxy and apply two coats of epoxy over the exterior filler before your surfacer--this way you've got a really good moisture barrier below and above your fillers. Bob
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