It is a Duplicolor rattle-can, do not remember the number. The short block was purchased from DSS, they cater to the 5.0 crowd so it had a professionally applied layer of Ford Corporate Black (LOL) on it. I degreased the crap outta it, masked it with aluminum tape, and shot it in my garage. The paint is a few years old but has not been sujected to corrosives or heat yet.
I've no presonal experience with them but I have heard bad things about clearcoats, they tend to get discolored themselves and make the aluminum stuff look bad.