I bought my Commander brand new last week and on Friday, couldn't wait any longer to shoot it. I was a rainy day, but the range had a covered shelter so I went for it. Now, I'm not sure if it's from the moisture, or from handling, but around the grips, safety, and on top of the slide is a slight rusty discoloration (the gun has a brushed stainless finish). I have rubbed it down twice real good with Shooter's Choice FP-10 oil and it might have helped a little, but I can't get rid of it. What can I do? I can't believe my brand new Colt is already rusty. Thanks.