Quote:
Originally Posted by jimepting
ort. I also know from personal experience that resin is not compatible with styrofoam. I have tried to mix it in syrofoam cups and it just disolves the cup. A while back I discussed this with someone in the ecomodding community who indicated that this problem could be sidestepped by painting the finished styrofoam shape with a water based latex paint before fiberglas overlayment. No direct experience, but I've heard it.
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depends on the resin, the styrofoam, the release agent(s) and if you sprayed gelcoat first.
I've had good luck with using
Urethane Foam , Expanding Marine Polyurethane Foam in a laminate as long as the resin kicks quickly, and you don't try and vacuum bag it (crushes foam cells).
I have also sprayed gelcoat / enamel paint over that foam then a mould release and have 0 issues pulling the mould.