Black always looks great! I did it for my car too back when I had hubcaps haha moved onto 18's now
when I painted them with actual spray paint, I used high heat primer for 2 layers and high heat satin black spray paint for another 2 layers.
Used 1 can of each, and definitely cut it close since I had to stretch the final coat out. Go with 2 cans and you'll be fine.