What to paint headers with?

All I can offer is that I tried to paint some Hedman headers several times without success, however I attribute some of my issues (rust) to living in the Pacific NW. One thing I can offer and as stated is to blast the headers prior to painting them, do not think that the coating they come with acts as good primer because it doesn't. Personally, I would not use anything but coated headers anymore; sure they cost more but they last a very long time.