Phillip Crenwelge ( now in East Texas ) does excellent work on P-Guns , as well as almost all high quality target/competition guns......My only personal experience with his re blueing was, and remains very Satisfactory.
An early 80"s MX8 20 that saw heavy use here and much high volume foreign dove shooting over the years. Great guy, stays VERY Busy
Trades as Phillip's Gunsmithing.