I recently shot a match with my Custom Target II. It started to rain during my stage and the pistol got pretty wet. Of course, when I safed the pistol and took it to my vehicle, I wiped it down with a clean rag with a few drops of oil on it. The next day, the entire slide and rear sight was covered in surface rust, along with the barrel hood. The magwell was also surface rusted. I exposed my Colt to worse, and never saw anything like this. It's all good now, but,.....? I'll never get it wet again.