I have fiberglass hood that is unfinished on the engine side. I was wondering if I could take a gallon of resin mixed with hardener and pour it onto the underside and work it around to cover the unfinished part. Sorta like melting butter in a frying pan. This would smooth out the underside for painting and detailing. Will the heat cause a problem with it later? If this is possible, are there any prep tips I need other than cleaning it.