I have a Kel Tec P3AT rust issue. The exposed left corner of the chamber end of the barrel gets a nice couple of rust spots after I carry it for a few days. I use EEZOX dry-lube, which works fantastic as a lube, and was supposedly the premium in rust protection, but it has failed miserably. So far there is no pitting on the metal, and I have stripped the eezox off of that one spot and have some hoppe's 9 smeared on it to take care of future rust. My real question is how do I get rid of those rust spots. I have brass-brushed them until my arm is sore, but to no avail.