POR-15 High Temp Paint

Has anybody here used this stuff? I would like to paint my exhaust manifold and stuff so it isn't that rust color (yuck). I'm assuming this stuff will work - here is a link to the page. Looking for opinions from people that have used it - how good does it hold up / last.

http://www.prp-porstore.com/page/por15/CTGY/HiTemp

Thanks