Krylon fusion!!!! very inexpensive paint and works great, make sure that before you spray the tank you use tape to cover what you dont want to get painted, and also very important, clean the back of the tank usually they have a solution at wal mart, it removes all the oil thats in the back of the tank, if theres oil when you paint it when it dries its going to bubble up and peel, the oil comes from your hands or whoever touches the tank our body oils smudge it, and when you clean it with a towel your not really removing it your just spreading it all over the tank, its a pre paint solution wich shouldnt be expensive at all but, well worth using.