by Sidekick » Mon Jul 17, 2017 10:54 pm
There is a cardboard covered foam sold at most building/roofing supply houses that takes fiberglass resin both epoxy and poly ester. I have used it for years to make cars, boats, consoles, air compressor covers and other things. It is easily sanded- tho you will want to wear a respirator, and it bends pretty easy. It comes in 4x 8 sheets- 1/2, 1", 1 1/2, 2, 3, clear up to 6 inches thick. Normally it is used on commercial building roofing to provide insulation and support for plastic membrane roofing. There was a big article in Mechanics Illustrated where a guy was making cars, sub marines ( scuba type) and other projects . I will try to find the article. Blue polystyrene will not accept poly ester resin without a protective layer to separate them. It does work with epoxy- but I react very badly with the fumes even with protection. A surf board ins made of styrofoam sandwiched or wrapped in fiberglass and is very light and strong but gets real expensive quickly.
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- car I made using foam and fiberglass in 1982
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