Didnt see an NFA section (or maybe i should join a machinegun forum).....anyway i have a 1928 model thompson with a parkerized finish. its a pretty beat up finish, no gouges or pitting just alot of wear. Now the question is do i lose alot of value refinishing an NFA item? I mean they arent adding any of these (or any other full auto) into circulation and at the least it would look really pretty. If for the refinish, would i be better off with the bluing or re-parkerizing it?