I didn't do anything with them. I figured that anything I do is going to result in it still being noticable. Often in my woodworking experience when faced with a situation where covering something in a noticable position was required, it's sometimes better to clean it up and let it be part of the character.
You could put underlays on it but then you still have a hole to fill. You could fill it with epoxy and color it to match the belly glass but mine were cut into the Maple lams and you would notice that when looking at the ends of the tips.
I decided just to leave them, they bring questions when someone is looking at the bow and it's interesting to talk about it.