Folks I need help ASAP. We have been staying with some friends for a few weeks. They have a humid basement and like an idiot I put my 870 and mosin nagant down there. Tonight I went to inspect them and there is rust build up on the outside of the guns. It is pretty bad. Now this is the first time this has ever happened. I am new to rust and guns but it doesn't look like any of the metal has been eaten. When I rub the rust off, it comes off in flakes which seems kind of weird. Like I said, it seems like there is a coating but no damage has been done yet. Both the 870 and mosin internals look fine from where the Hoppes oil has done it's job. What do I need to buy and what should I do? How much time do I have before my guns start pitting and the rust actually starts eating the metal. Again I am new to this as I have never had a basement before!!