So my buddy with a m&p9c left his gun in a lock box under his seat for a week or 2. (yes I told him not to leave it in his car). His car has a small water leak somewhere so it is always "moist" inside for lack of a better word. so he takes his gun out today and its rusty as hell. So whats the best way to clean it up? Sam Outdoor Hub mobile, the outdoor information engine Wanna kill these ads? We can help!