TweetI would probably leave it the way it is. However, if it is sentimental value and you are never going to sell it, you could finish it and consider it as if you had an old car handed down from your grandfather to your father to you, and you wanted to restore it to its beautiful original condition. But with the gun having markings that you can relate memories to then I would avoid sanding it down. What you could do though is have the barrel and metal re-blued and just put a nice finish over the wood to make it shine again.