You may be confusing decorative chrome process and industrial hard chrome process.I'd say sandblast to bare metal and Cerakote. If you are looking at economical.
As far as the "hard chromed" comment, metal is nickle plated prior to chroming. If you are wanting it redone, just don't go to the final step of chroming.
You may be confusing decorative chrome process and industrial hard chrome process.
I own a Cogan hard chrome revolver and I don't think there is an undercoat of nickel.
I could be wrong....
These guys are not....www.apwcogan.com