System Three Marine Spar Varnish is designed to provide durable UV protection for demanding marine applications. It contains state-of-the-art UV absorbers, which will keep wood looking beautiful even with constant exposure to strong sunlight. It’s also resistant to scratching and marring, as well as many cleaners and solvents. Unlike most varnishes, our varnish for wood is formulated to dry over a wide variety of epoxy resin systems including marine epoxy. You can varnish spray anything with proper precautions and techniques and achieve a glossy wood finish.