I've had my P3AT for a few years now. I have only shot about 200-250 shots through it in this time. Last year, I sent it back to KT to slide replacement as it had a slight crack in the rear of it. Since then I have noticed a good bit of wear on my frame rails. The rails are basically silver. I know that with Sigs, you need to worry once the anodizing has worn off showing silver on the rails. My question is should I be concerned about the rails on my P3AT like I would with my Sig? There's a couple of tiny burs on the frame rails and the slide itself. But the burs don't correspond to each other. What I mean is that the burs on the slide don't match up with the ones on the frame. Is this something that I would want to 'file' off my self? I have always taken care of my gun and these burs are not from me.