I recently got an M48BO. It's actually an early 4-digit matching serial number M48 that has been "scrubbed" and reissued as a BO model. It took me about 3 hours to get all of the metalwork cleaned of Cosmoline with a bucket of mineral spirits and a paint brush. The stock was pretty dry. It was 92 the day I was cleaning, and the stock was just a little sticky. Because I wanted to shoot it, I just gave the stock a quick wipe down with mineral spirits. After everything was dry, I oiled all the metal parts and reassembled. It shot great. 1.5 inch group at 50 yards. I'm struggling with what to do with the stock. Should I leave it as-is (it's got pretty good color, and doesn't seep any when shooting on a hot day), should I finish cleaning the stock and hand rub with BLO or Tung oil, or should I strip it, sand, and re-finish with something modern? If it were an M1903 or an all original Garand it wouldn't be a question, but the Yugos aren't exactly collectible and I can't see losing much value in refinishing. I don't want to commit C&R heresy, but it could look really nice with a good finish on it. What do you guys think?