I have used Martin Senour TECnique Iron Cast #7250. I forget who suggested it, but I believe it was on here. Works great, looks great, it is a flat or semi-gloss finish so it's not too glossy. It's available at NAPA in a big 15 oz. spray can for 'I believe' about $8.99. FYI - the top cover, and the round disc in the end should remain natural aluminum color.