we fill all of our sponsons with 2 part poly foams. no weight issues and quiets the ride. and we use plywood for our floors.
marshmat is right. just use emron or something similar. its less overall work and the finish will shine just as good if not better than gel. just...
we at Twin Vee use it as our tans. core. have switched from plywood. we have recently done this so we dont have much field data as of yet. we are...