will be installing marine grade vinyl on ext grade ply, I plan on sealing the plywood with poly resin first with no cloth. will the vinyl adhesive work with this "sealed plywood" ??
Yes but the resin is not going to do you much good unless you add some cloth or at least a layer of csm. For that matter you can seal the wood up with epoxy paint and then glue the vinyl.
what brand of epoxy paint? will I need to rough the service up before the adhesive.? I like the looks of Lunds boat flooring but cant find the brand that they use on there boats?? any ideas?