I suppose the expensive solution is to remove the manifold, have it media blasted inside and out and then ceramic coated in black.

Probably cheaper to buy a new manifold!

But to be honest, why do it? The manifolds develop patina from age and use... in my view they are not supposed to look as if they came out of the factory on a well used car.


Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...