My Stainless Kimber's finish did the same thing. It is a 17 Mach2 that was having issues with reliablitly. It was sent back and Kimber did make it run correctly, new barrle, bushing, trigger, and hammer. Sadly they left the pitted up slide with it.
It is going to be getting cerakoted soon, as every time I look at it now I get annoyed.
ETA Before shipping it I had spoken to Kimber and described the problem of function and of their SS pitting up, I then attached a note saying the same thing. When I got the gun back with the slide still messed up. I called them again, and the very polite person on the other end of the phone told me that there was no mention of an pitting on any paperwork they had.
"Government is not reason; it is not eloquent; it is force. Like fire, it is a dangerous servant and a fearful master."
-- George Washington