I recently purchased a 20' sportcraft that needs deck and transom repair, I have researched endlessly on the types of repairs that can be done with satisfactory results...Complete replacement is out for sure and I have seen countless youtube videos where they pour a poly resin with chopped glass(Seacast) into the voids with great results and I truly believe it works well. my question is... there is still viable plywood at the very bottom 8-10 inches that I cannot get out, I initially wanted to stabilize this with "Totals" penetrating "Epoxy" and then proceed with the poly pour, but I have read that poly resin does not stick well to epoxy and that, along with no way to rough it up down inside makes me a bit nervous about getting a good bond. So that brings me to the conclusion that maybe I should use a "Styrene thinned" Poly penetrant(UNWAXED) to penetrate and stabilize the remaining wood and thus allowing a good bond with the Poly pourable with chopped glass...Any help out there? Thanks in advance