EcoPoxy products do not need finishes. They naturally cure to a high gloss. For a matte finish, you simply sand the surface with 3,000-grit sandpaper. Most oil based finishes should adhere to the epoxy or at least form a film overtop, which can clear it out after sanding. The optimal grit for most finishes is 320 or higher. Proven brands like Osmo, Rubio, and Odie’s oils/waxes have been used with great success by many customers.