I did mine in one day...I didn't use any primer but I used enamel paint. I also sanded mine down to the bare metal. I used 250 grit sandpaper to get rid of the paint then used a 500 grit to smooth is out. That took the longest. I made sure that it was even all the way around. I sprayed 3 coats of gloss black enamel. The only thing that I had problems with was that I did it outside and a few pieces of debris got stuck on the wheel. You can only see it when you get right up on it and look for it. I didn't clear it cause I kinda like the sorta flat black look since my car is a very bright color. Here's the finished product...
