Most of the observed CCH wear comes from people wrapping their hands around the receiver when they carry the thing about. Look at a dozen guns, trap or field, and you will see what I mean.

I just can't buy into sunlight not taking a toll on colors. Areas behind the balls or in front of the trigger guard typically show fading, but these are not areas that get handled. I have some very old closet queens that get taken to the traps regularly, but the colors are still new, and I thank that dark old closet/safe for that.

Ever the paranoid, I typically lacquer any new acquisition.