I have a vintage Savage that was drilled for a scope at some time in the past and I'm considering restoring the rifle. What is the best method of welding in the holes prior to a reblue? I know that certain welds will blue a different shade of color (such as tig)... but is that the case in every instance? I am a crack gas and mig welder, and I am leaning towards mig as the way to go, but would like to hear some comments. Gas would tend to be too hot on the metal, causing deformation of thinner pieces, whereas mig is fast and clean. But how would it blue when standard wire is used? Also, is there a way that stamped lettering can be restored after the weld?