You can get the rustoleum at Lowes, Home Depot, Super Wal-mart, Wal-mart, Ace hardware (the Ace brand is the same thing but cheaper)

and you can get it in gloss black, satin black, and flat black.

You'll have to get the mixture of Mineral spirts to paint just right for black though, it'll show orange peel and runs and any imperfections pretty easy. Do it in a well lit garage so you can see any imperfections and make sure you get the imperfections out before you add another layer, especially with black.

I just spent half the weekend sanding off a black paint brush paint job on a car I bought where the original owner put the paint on too thick and didn't wet sand. It was nothing but orange peel.

To give you an example of black orange peel:




and the sanding job. . .



I'm gonna take the time and prime it again. . . I had to go down to bare metal in some spot. . .