DON'T DO IT!!!!!

When I first started collecting military weapons 20 years ago I
enjoyed refinishing them myself with BLO. I still have my first M1
carbine I refinished and it turned out beautifullly. IT IS
WORTHLESS!!!! Neither me nor my friends that are collectors have much
interest in refinished weapons. The scaring you showed in the
pictures is part of the firearm and part of it's history. Respect it
for what it is "A weapon that has been lugged around by some infantry
man somewhere". If he carved his initials in it 50 years ago, all the
better.

But that is just my opinion!