Exhaust systems live in a world most coatings were never designed for. Temperatures cycle between ambient and 600–900°C on a standard petrol engine, and well past 1,000°C at the turbine housing of a turbo. Conventional paint — including high-temperature rattle cans — begins to degrade somewhere around 200°C.
What actually happens to paint on an exhaust
The first few heat cycles look fine. By 500 km, you'll start to see micro-blistering at the weld zones where heat concentrates. By 2,000 km, paint is peeling, oxidising and looking worse than bare metal. The job then costs more to redo because you're removing failed paint on top of the original prep work.
Cerakote H-Series: designed for this environment
Cerakote H-Series is a polymer-ceramic composite, not a paint. When cured at 177°C, the polymer matrix cross-links with the ceramic particles to form a hard, porous-free film that expands and contracts with the metal rather than against it. Rated to 982°C (1,800°F) continuous, it won't blister, peel or oxidise.
More importantly, it reduces radiated surface temperature by up to 50%. On a turbocharged engine, this directly affects underbonnet air temperature — cooler air into the intake, lower heat soak into the battery and ECU. For a track car, this is a measurable performance gain.
Our process at Bessoni Customs
Every exhaust starts with media blasting to bare metal. No grinder prep — mechanical prep leaves peaks and valleys that hold contaminants and reduce adhesion. After blasting, the part goes through a solvent degreasing cycle and into the booth within four hours. Cerakote is applied at 0.001" film thickness per coat. Cure is at 177°C for 90 minutes. We verify with a film gauge before anything leaves.
If you've had exhaust paint fail before, it was prep or product. Usually both.