I've got ceramic coated TTi headers on my Road Runner. I've had good luck touching up small scratches in the past with silver header paint.
But that got me to thinking...
What if I wanted to paint them with black header paint for more of an old school look? How well would it hold up?
I don't think I could get up the nerve to try it myself. Not on a set of high dollar TTi's anyway.
I suspect adhesion wouldn't be very good. The ceramic is so hard that it probably wouldn't etch without some surface prep to rough it up.
I think I read where some other manufactures are actually offering a black ceramic coating now.