Not to contradict any one, but I would never use WD-40 to wipe a gun down. wd-40 is alcohol based and literally drawls moisture out of the air and onto what ever surface it is sprayed on. A light coat of gun oil is what ya need. I will tell you how volatile WD-40 is. You can use it start enginies, it is actually the best thing you can use to start em instead of starting fluid, Ether doesn't have any lubrication, WD-40 has some oil in it to help protect that initial start up. Well enough of my opinion. Pat