Gun cleaning FAQ Here are some common question that I see and some quick answers: Can I over-clean my gun? Not really. However, if you super-clean it, you must always apply oil to the gun after cleaning for 2 reasons. One is to protect the finish and keep rust away. The second is to make sure the moving parts slide easily. Can I use WD-40 to clean my gun? Absolutely. I would use it on metal parts ONLY. WD-40 is…