Check out those new copper treated gun socks and cases that are supposed to stop rust for at least 20 years(forgot the brand name). I also get a rag that comes in a jar called rustprufe at my trap range that works pretty good at preventing rust on the outside. Also if your not going to be using the gun for a long time you can try boeshield. It is a waxy spray on that leaves a thick wax likecoating over any part/gun but its too much for everyday use as its a pain to clean off. I use it onstuff that I may not see for ayear etc.hope it helps.