I have had this old snack machine in my garage for about 25 years. I have been thinking of converting it for gun storage. It weighs at least 400 pounds and it built like a vault. I remember some older post on TA.net where a guy was converting Coke machines into gun safes. They were very nice.
This one is totally mechanical and works. Would be easy to remove the mechanics and install a rod dehumidifier and light.
The refrigerator would work if you could properly secure it.
Paint the guns in kielbasa camo and hang them from strings? Put a bunch of calorie charts and a Weight Watchers 12 step list on the door (explains the locks). Other signs - 'medical waste', 'tissue samples', 'for urine/feces samples ONLY'