What about fiberglass and a marine epoxy resin that I won't need to paint over will I, aside from possibly making it more pleasing to look at?
Also if I were to go 8x4x2 would I be fine with fiberglassing 3-4 layers worth and some internal bracing basically 2x4s in the corners and seams to make sort of an internal frame? Would this also work with 8x4x3?