I have one M39 that seen action that had a chipped mark in the stock were the hand grip is. I had to try to clean it up a little because of splinters. For some reason i couldn't restain the area. I figured out a trick to apply the stain and let it dry and repeat it until it matched the orginal color. Then i applied tung oil on the whole stock and it came out awesome. I believe the finn's used some sort of a stock sealer.
If you can use the FMJ .311" bullets you can find the surplus military pulled bullets at a decent price at
www.wideners.com I use the cheap fmj pulled bullets for plinking and target shooting. Why waste the soft points.
I also use the CCI#34 nato primers and IMR 4895 powder in all my reloaded ammo for my military surplus guns this way i won't mix up my ammo for the bolt actions and the semi auto's i can use it in both actions with no worry about a mix up. As i get older this is a good thing and safe too.