Just bought a bottle. If you leave it on and let it dry and then daily carry in a leather holster, how often do you have to reapply for rust prevention? I heard it lasts just about forever if it doesn't get rubbed off, but how fast does it get rubbed off in somebodies pocket in a holster? Anybody use this stuff a lot and have advice for rust prevention? Thats what I am using it for, I use other stuff for lubrication, like grease.