Personally, when I re-did mine I used good old Krylon semi-gloss sprayed on from a good distance to give it texture. For the amount of exposed sheet metal it looks great! And was very in-expensive to boot.
When I bought some dash paint from Totally Auto yeas ago, this was the method they suggested to get the proper texture and to flatten up the paint. The same semi gloss can be used for a glossier appearance on grills and columns by spraying the paint closer and applying it wetter.