I've used VHT on headers it lasted 2 years then started going bad slowly. Acetone wash and sand blast prep is a must. If you touch them with your bare hands before or after paint you will see it soon! I gave up on ceramic coatings, my new Jet Hot headers rusted and so did another fellows, not sure where he went. Mine are pealing badly on my Dart. Jet Hot did em twice! The only thing that I find that works every time is stainless steel. Its only too expensive if your selling the car. I've had my Cuda for 27 years, never using mild steel again. Ad up the value of your time , blasting, paint, prep year after year?