I purchased a product called 303 "The worlds most powerful UV sunscreening formula." It was recomended for the gasket on my dry suit, fiberglass boats, and plastic sea kayaks. Has anyone used this product on their glass and epoxy boats that also have have been varnished? I contacted West Systems and System Three and was told "I never heard of it." It comes in a spray bottle like Armorall, the car care product.