I want to refurbish my coin doors but I've never refurbished any metal before and I had a couple of quick question. First off, the coin door isn't in too bad of shape. It looks as if it was sprayed once before because of the couple of dried up drip spots. Will I need to completely remove all of the old paint or do I need to only remove the rusted spots then spray? If I need to remove everything, should I sand it, or use a wire brush? I think the wire brush would be much easier, but they can be unforgiving. I figure I'll use rustoleum, flat black, unless anyone has other suggestions.

