What to paint headers with?

I bought this....
Thermal Exhaust Manifold Coating & Header Paint | ZyCoat
but I haven't tried it yet. It's expensive, but if were to last a long time and give the heat reduction they claim, it will be worth it. I called and spoke to someone in the company..I he was the VP of hushmat that makes the sound and temperature insulation for autos and he swears by it. We'll see. For the inside of the pipes I bought eastwood's internal exhaust paint with the spray adapter that allows one to spray all the inside of the tubes. Haven't tested that one either but I've liked all eastwood's paints that I've bought. Lastly, as mentioned above, I've heard of people good results with the BBQ grill paint. I think there is a youtube video of someone that compared and used VHT and rustoleum high temp paint and the rustoleum was better. I personally use krylon BBQ paint for much of my work that needs to painted black because it's so tough and lays out really nice but never used it in an exhaust application.