I just bought a early 70's Bear Grizzly off of E-bay, colors green and black. In the riser (green) are two small holes that were used to mount a quiver. I'd like to patch them and color match. Any ideas? Also on the limb tips there are some scuffs in the finsh over the glass. I'd like to do a little spot refinishing. Can I use a standard polyurethane, maybe marine grade from the local hardware store, or something more a speciality product? Thanks in advance.