Epoxy or fiberglass resin would be first class, I think.

Quicker would be a couple coats of shellac and then a couple coats of exterior high gloss polyurethane.

But, I’ll defer to my coatings consultant, Sitka. wink


If you take the time it takes, it takes less time.
--Pat Parelli

American by birth; Alaskan by choice.
--ironbender