I used VHT Flameproof paint on my manifold. It's only been a year, but it looks as good as the day I painted it. It cures with heat. It's the same paint that Kansas Customs uses on their split manifolds, too. I did remove the rust on my manifold using electrolysis prior to applying the VHT.
www.vhtpaint.com/high-heat/vht-flameproof-coating
