How can I make my slant six exhaust manifold look great?

Hi All: I'll soon be pulling and painting the slant six motor in my 1974 Duster. The car has its original stock exhaust manifold. Its sound, but looks pretty rusty and cruddy. A number of years back I has the manifolds from the 440 in my 69 Charger ceramic coated (I think). Whatever it was that they did, it still looks absolutely perfect today, 25 years later. I want to do this to my Duster's manifold. What's the best process to keep that perfect tan/machine gray look that won't come off or discolor over time? I've had bad luck with hi temp paints. Seems like they need to be ceramic coated to stay looking good. Photo below. What do you think? Thanks - cruiser

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