Have a Weatherby Fibermark stock that came with a rifle. Could use some touch ups in a few places. Wondering if I should use an epoxy or "Bondo" type filler material? The spots in need are not very deep, but will show when I repaint it.

Any thoughts?

I'm also refinishing a Fibermark stock. Bondo works fine.

All I ever used for fiberglass is bondo and glazing