I keep my firearms in 2 gun lockers not safes and my gun room has a draft from an unexpected "door falling off" incident.. Every so often I will open my locker and some of my guns will have a brown/orangeish rusty look to them. I will take a cloth with rem oil to it and it comes right off.
I have an idea of takeing an old fridge/freezer and gutting it and building racks and barrel rests in it. I would use the freezer part for some ammo storage.. What do you think about the idea? Any suggestions on how to improve the idea?
If you're going to build racks and barrel rests, then you're probably competent with tools. You might consider adding a locking mechanism to the refrigerator door. The refrigerator would weigh enough to keep it from walking out the door! Also, the dessicants that Axxe55 suggested would work just as well (or better!) in the refrigerator.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed." 2nd Amendment to the Constitution of the United States
Practice does NOT make perfect. Practice makes permanent. Only perfect practice makes perfect.
Also something to keep in mind, a fridge is relatively airtight so whatever humidity is on the outside will probably remain inside after you shut the door. Dessicants are great but need to be replaced quite often. A dehumidifier would be my choice, they make them specifically for gunsafes. I suppose all you would need to do is drill a hole for the cord, plug it in, fill the hole...
Another suggestion and only a suggestion would be once you complete the fridge upgrade is to have a 100w light bulb and not the curly ones (in main compartment) to help keep things warm and dry. This has been tested but only with my welding rods but for the same reasons.