WD-40 is a very powerful product and should be used with some discretion. I stated a few of my uses with a negative on wheel studs, Tom told it better but that's the idea. I'd like to relate one anecdote, I hope it's permissible, I have a friend who's a cop, he used WD-40 to oil his police special, decided to do the bullets too...when it came time to use it in a critical situation the bullets wouldn't fire...the PD issued a warning bulletin. Get the idea?