I am finishing an exterior fiberglass door. The door is woodgrain and will be stained prior to clear coating. At the advice of some on this forum, I have used many gallons of the Lenmar Megavar conversion varnish. I like it a lot, but I have no idea how it would hold up to the moisture and UV that it would receive in this application. I have UV clear that I could use on it, but we're looking for a satin finish. Any advice would be greatly appreciated!