Im replacing a 4'x4' section of my boat floor and i have a question about sealing it. Should i completely seal the new plywood...top, bottom, edges etc. with the epoxy resin i got from West Systems? The original Douglas Fir plywood floor was only sealed with resin on the top, the bottom of the plywood (facing down to the hull) had no resin on it...im wondering about the new plywood being able to "breath"...should i seal it completely or not?