I have a Kimber Custom TLE II 1911 which has the stock stainless steel barrel in it. I have taken it shooting about half a dozen times and put probably 800-1000 rounds through it. I always field strip it and clean it after shooting and then re-oil and put it away in the case it came from in a drawer in my house. I live in the gulf coast area of Texas and don't carry this gun as a concealed weapon. Here's the problem: The last two times I have stripped the weapon down I have noticed that part of the barrel is developing some very lite surface rust on the outside in the fine ridges along the barrels length. I have tried using gun cleaner on it and a nylon brush to clean it. No luck. I have tried rubbing it for awhile with a cloth and normal gun oil. No luck. I don't know if my situation is normal or not. Does it pose a problem or lower value of gun? Is there anyway to reduce or reverse this problem. I have shot my gun until the barrel has become too hot to touch but in my opinion any gun should be able to handle this sort of use. Let me know what y'all think.