Nice! I've owned four Kimbers at one time or another, and two of them had the barrel rust issue....although it was more of just kind of a tarnish on the outside.....not the kind of "frosty" rust you some times see. Didn't affect the way the barrel interacted with the bushing at all though.
So the rust issue is only with the barrel and not the frame and slide?
"A strong body makes the mind strong. As to the species of exercises, I advise the gun. While this gives moderate exercise to the body, it gives boldness, enterprise and independence to the mind. Games played with the ball, and others of that nature, are too violent for the body and stamp no character on the mind. Let your gun therefore be your constant companion of your walks." Thomas Jefferson