step 1: sand 'em down
step 2: 2 coats of etching primer (whipe em down with a dry rag. dont sand the primer, thats what gives it the texture)
step 3: 2 coats of Duplicolor Engine Enamel
it comes in gloss black, semi gloss black, and flat black. i used semi gloss on my vehicles. here's my factory wheels...
and here's my GTI, same stuff...