David
Over the years I have seen several "stainless" rifles change color drasticlly. In every case the piece had been left in a wet soft case for an extended period of time. The worst I saw was a Mod. 70 left in a leaky Camper,in a soft case, on Vancouver Island for about three weeks. It turned a mottled black. Actually I found it kind of attractive but the customer was not happy. I never did find out whether or not he fixed the Camper. Winchester replaced the rifle.