smoothshooter
50 Cal.
I was wondering about that...what types of finish/oil/wax/varnish/poly finishes promote or prevent that. ?? What about some clear nail polish? Another possibility, might be to take the barrel out of the stock, and sand that area a bit, re-stain to match the finish, then rub some good quality (like bow-making epoxy) epoxy into the wood in that area, really work it in. Let it set up, then steel wool to match the rest of the finish.
Now when I made a band-aid, like Coot, I had a hole in the leather, and the nipple went through the hole. Did not obscure the sights, your sight must/might be lower.
Piece of masking tape.
Remove when done shooting.