i just painted my exhaust. I used the 2000 degree flat black rustoleum.
Auto Specialty Paints High Heat Product Page
It wasnt that bad of a process.The procedure i did:
1) Remove headers
2) sand headers ( i used red scotchbrite)
3) paint 3-4 coats
4) reinstall headers (be careful because the paint scratches easy before its cured
4) once its all installed and on the bike you have to cure
Curing Process:
1) turn bike on and leave at idle for 10 minutes, then let it cool down
2) turn bike on and leave at idle for 20 minutes, then let i cool down
3) turn bike on and let idle for 30 minutes at running temperature (i got fed up and went for a ride lol, I grew impatient)
Tips: be careful during reinstallation due to easy scratching. If it does scratch, it should only be a light one so once it is back on you can do some light touch up spraying and it'll look perfect. Then cure the bike.
I did some touch up after i cured it and then just ran the bike after. It worked just as well then too
Also just a quick note, the headers will smoke a lot for the first couple of minutes. Don't get freaked out by it. It will stop