I'm just now finishing up a 30 lb. pedestal musky going after a yellow perch. I'll mount it to driftwood at two contact points attached to a 1/2 inch plywood base and habitat, and the customer will pick it up that way and build his coffee table to fit. What would be the most effective way to seal the plywood before I apply a sand/Elmers glue mix? Orange shellac, some kind of paint? I know some things that would definitely work but I want to hear from others what they would prefer from experience. I know from experience the plywood will warp if I don't seal it. I know I could probably use a resin/sand mix but I don't want to work with resin if I don't have to. Thoughts?