A smart move is to pick one of the professional gun re-finishers and have them strip the plating and blue it at the same time.
First, they have to identify WHAT the plating is, since the stripping process needs to match the plating. In other words, they have to figure out if the plating is bright nickel or actually chrome.
Once the plating is identified and stripped, they can blue the gun with whatever level of bluing you want.
Note that these days you can have cheap bluing or you can have good bluing.
Good bluing is expensive because it's almost all hand polishing.
A good blue job keeps all the metal surfaces in factory original shape, no rounding off of edges, no dishing out of holes, and no ripples in the flats.
Nothing looks worse than a nice gun ruined by a ham-handed polisher.
Here's some top professionals who can strip the plating and re-finish to whatever level of polish you want for the blue.
I'd suggest talking to them about what you want.
http://www.apwcogan.com/
Possible the best all around gun finisher.
http://www.fordsguns.com/
http://www.elitecustomguns.com/index1.htm