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I did a set of exhaust manifolds for my V8 Audi with their primer and chrome coats. Haven't actually run the engine yet, so I don't know how they stand up to heat cycles. Swaintech is still pretty much the best of the best and what I've seen the best results with. That said, I did this as an experiment since I already had the equipment (sandblaster/powdercoat oven).
You have to be very careful on spraying it to make sure not to put on too much. I did the first time and it cracked and peeled during baking. It was a major pain to get it blasted off to redo. Also, make sure if you do a primer coat first, that you very lightly etch with the blaster before the final coat. I forget what pressure I set on my blaster, but it was much lower than your normal blasting pressure. Just enough to lightly etch, but not remove anything.
Primer coat:
Chrome coat after polish (you'd need a vibratory polisher to really get it to shine, this was done by hand):