Another possibility is using tractor paint. If you have a local tractor supply a lot of them have tractor and implement paint. Tractor Supply is local to me and I've used both Valspar and Majic paint on my truck.
Tractor Supply Matte paint link. . I've not used this black but have used both cream and gloss black.
My truck picture here. Hope this helps in your decision. Have fun and good luck.
Dan
