It is possible, but welding can cause additional problems.
Usually adding nickle or chrome takes it out of tolerance, so you'd think taking it off would improve it.
Either the person who added the nickle took some metal off to make it function or else it was loose to start with?
A nickle gun shoots as well as a blued one, just many folks don't like them. I think they are part of history and think everyone should own at least one
Ed