If don't want a primer, and you want it to last, you have a few choices:

Single stage catalyzed black urethane with flattener added,

Black basecoat with either a flat clear (which PPG makes) or catalyzed urethane clear with flattener added,

or catalyzed black acrylic enamel with flattener added. This one will stay sticky longer, and attract more dust.

I did one about 8 years ago, using the first option, and it still looks fresh. I'll see if I can find a picture.