Want it correct or beautiful? If you want it correct go buy the cheapest gloss black paint money can buy and blast it on without much regard to anything (neatness, conditions, etc.). Ultra cheap gloss paint (think tractor supply) usually dulls back all by itself so no flattening agents required. I would recommend using a catalyzed paint and that you apply with a paint gun as opposed to rattle cans as it will hold up much longer if catalyzed.
