I've done a few bows with spar urethane lately and the only downside seems to be the shelflife and brightness, which i like on some bows. My question is can i apply tru-oil over top of it. And another question. I have a bow that i have finished with tru-oil and then apllied wax over it.(it was the wax that came with the tru-oil kit.) can i add more true oil over the waxed area. or do i need to strip it?