Living in the dry climate of Colorado I've never experienced or had any issues with rust before. I picked up a new LC9 and a Don Hume IWB holster for it; the one without the slide guard. I carried an XD sub for a couple months prior to switching over to the LC9 and never had an issue before. After just a couple days of carrying the LC9 the back end of the slide, where it contacted my skin, was starting to rust. I was able to get the rust off but also removed a little of the original bluing in the process. I then touched it up with a bluing pen and oiled the crud out of it overnight. This is how it looked before and after the touch up. I just hope there won't be long term problems or that this isn't a sign of a lesser quality bluing being done by Ruger