I decided that I am going to have a two dish setup, that way i dont have to run extra wires to a polorator. I have a generic 31" Dish, not tot bad of a dish, but after 6 months of use, the powder coat is flaking off, and rusting badly. 1. What would be a good, outdoor paint, that would not rust bad, and finish well? 2. Since there is rust, would it be best to sand it down to bare metal?