Thanks “contumacious” for the feedback and info. This outdoor project is a first for me, as my previous art projects have all geared to interior work. The weather elements will pose a problem on an outside paint on wood project, for sure. Because of the relative small size of these plywood canvases (20” x 30”) construction, prep, and illustrating are being done in my man-cave/studio. I have about 100 feet of cedar fencing that runs parallel with the bike trail, so I can exhibit several canvases out there for the folks. I finally went with The Chroma Mural Paint which is liquid heavy body paint. It dries to a matt finish, but the coat of Urethane varnish will add a gloss.