Take a look at TotalBoat Gleam Marine Spar Varnish for a durable one-part varnish. It is available in gloss and satin finishes, and you can apply up to three coats per day. For a satin finish, apply gloss build coats for depth and durability, then finish with one or two coats of satin to reduce the gloss.

TotalBoat Lust Rapid Recoat Marine Spar Varnish is another durable spar varnish. You can apply up to five coats per day, and it is popular with professionals who want more flexibility when thinning the varnish to achieve the desired flow. For a matte finish, apply gloss build coats for depth and durability, then finish with one or two coats of matte to reduce the gloss.

TotalBoat Halcyon Water-Based Marine Varnish is a good alternative for a clear finish or one with less amber tint than the other options. For a satin finish, apply gloss build coats for depth and durability, then finish with one or two coats of satin to reduce the gloss.