Dustin got it covered.
Be careful re-hardening. You can make parts brittle and make the gun look awful if you don't get it right.
I admit I have a thing about re-hardening old guns, I just think they look wrong. Just my opinion, I realise there are plenty with other ideas.
Occasionally it works but he gun must have very crisp engraving and/or sharp and clean lines on the metal parts. New colour over worn actions looks like you repainted an old, weathered door over the old paint with a new coat of gloss.
