What to do with old 'altered' or old previously re-finished Guns, is one of those things one sort of has to regard on a Case-by-Case basis.
I have yet to see an old 'Chrome Job' which I felt would not be improved by being de-Chromed and even left 'In the White'.
Old post Factory Nickel Jobs, some are alright, most are "Bad" and, to me, the Gun would usually be better being de-Nickeled.
Old, typically badly done re-Blues, what can one do? Send it off where for five, seven or nine hundred bucks or something, an Expert can sort of correct some of it's cosmetic over-Buffed woes?
Eeeesh...
Many old 'Cut Downs' are charming and I feel are best left as they are...there will always be people like me, twaits, others, who like and enjoy old 'Chop Jobs'...and, many were quite well done, too.
Those old 'Chop Jobs' which might not have been well done, I see no reason not to apply a little finesse, and bring them up to the Mark for them to be well done...unless they have a Provenance which would recommend one leave them be, just as they are, honestly being poorly done, since it was part of some Romance of it's context at the time back when, and or the Personage, who had it that way, back when.
Lots of factors...