Quote Originally Posted by bruster View Post
fiberglass shrinks as it cures hint to the bowing...the cracks are from using to much hardner to resin. as well as having a real think layer......what is it that u are acually trying to do...i work with fiberglass alot building speaker enclosures.
Just sealing the wood... I've already put on one coat of polyurethane, but any input is still appreciated.