Hello, KTOGers, I finally bought a P3AT--2nd generation, used. the previous owner, a buddy of mine, did not take good meticulous care of it. there was some spots of rust on the slide and the barrel was VERY dirty. i tried to remove the rust with '0000' steel wool and blue wonder gun cleaner. i got the rust off, but i also took off a bit of the blueing (rubbbed too hard, i think). i did a quick fluff and buff (did not remove the extractor screw, extractor, firing pin, etc) as well. there was actually rust in the slide rails, but the fluff and buff removed most of it (400 grit sandpaper). My problem is with the barrel--i have shined a light inside and i can't tell if it's just tough powder residue or rust inside. has anyone has experience with rust in the barrel? i am thinking about using a brass brush to thoroughly clean it (i use nylon brushes only). has anyone else had problems with rust on the slide? furthermore, i'm sure this gun has been dry-fired many times, so i am planning on ordering some button screws (extractor screws) and replacing the current one. Other than that...i should be okay... thanks!