The slides may be a black oxide finish, but the aluminum receivers aren't -- they can't be.
Why would a new poster come here to complain about his 'smith?
Type III hard coat, and this is where the problem arose, the ceracoat requires only that the frame be lightly blasted, just to rough up this hard coat so as to offer a better bonding of the two, though bonding really isn't the word I'm looking for. The frame and its ceracoat finish were perfect, it was never the issue, the issue was the slide, specifically around the area of the ejection port, the ceracoat simply refused to adhere there consistently.
What happened from there is that the tech had to strip the type III hard coat on the frame in order to plate it, here he destroyed it by submerging it to long in the acid which after removing the ceracoat and type III hard coat, ate away at the substrate of the frame, deeply pitting and cratering it everywhere!
As for the guy's in this thread taking issue with me being new here, and apparently wanting me to shut up my mouth for some mysterious reason, where else would one go with such an experience? By the time I posted this last night I was just short of certain that I had been royally taken to the cleaners, I've been quite clear about that, the tech took deliberate actions on the frame intended to portray me as the culprit, and the most sensible place to go from there was right here, the gun forum, where you can hope that someone else may have some past experience from which you can proceed upon, and to potentially warn other unsuspecting folks if need be, frankly speaking its a no-brainer!