I'll second that on Checkmate hard chroming. They do other plating for firearms as well but started out as a hardchromer and no doubt one of the best. Much of their work at this time is contract work for gun mfgrs, but they still take in work from gunshops etc. Don't know why they wouldn't do knives though. Call and talk to Horace, good guy, tell him your needs he'll tell you if he can satisfy. Have had more than several guns done by him over the years and always satisfied. Last time I was in I saw a variety of work both from main line gun mfgrs. and custom makers of note, guess they're satisfied too. HTH
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Only perfect practice makes perfect