Originally Posted by bstewart0529
Why doesn't the epoxy stick well to the poly?
Epoxy will stick just fine to the poly... it sticks well to all types of glass, and is the strongest. The opposite is NOT true- meaning that poly will not stick to epoxy. It needs a conversion coat (like vinylester) first. This comes into play when doing a hull repair with epoxy, and then following with a gel repair (since gel is a tinted poly).
It would be helpful to know when MC made the change from poly to vinyl and when they went from vinyl to vinyl-epoxy. I know CC transitioned in '89 and '93. I would only consider a poly repair on a poly hull (though even then I would opt for epoxy for its strength and workability advantages). On a vinyl or vinyl-epoxy hull, I would not consider poly as an option.