I'm making a sign for my uncle as a Christmas present. The it's basically a fame and panel, the frame is walnut, and the panel is black oak. The panel will be mostly or completely painted, and the frame will be not.
What's the best way to go about sealing and protecting it? One thing I don't want to happen is for the finish to turn white, or cloudy, crack, or turn yellow and flake off. For this reason I was thinking a penetrating oil finish, but I don't think that would do much for the painted surface. Now I'm thinking epoxy, or a marine varnish.
Thanks, Merry Christmas and Happy Holidays