My Calif guy that does ceramic exhaust coating does not do powder coating. His ceramic coating does not take 5 days, they use an oven.
I have them do other items in the Hi-temp silver ceramic, like AC brackets for street rods, it looks like chrome, because they polish the parts after the ceramic coating. Also they polish and use clear ceramic coating on Halibrand mag wheels so they don't turn green in the NHRA museum. I have even had them clear ceramic coat the hood ornament on my 48 Pontiac, instead of chrome.
I offer the clear coat on my front dragster wire wheels for those customers that want polished alum wheels, but don't want to have to any upkeep, just clean them like any painted item, ie spray detail wax. The clear coat is clear, not like some of shine goes away like with clear anodizing. The only way I can tell the diff between just polished, and clear ceramic, is the feel.
Call me if you need help , 805-444-4489
Jon Hansen, Hayden Wheels, [www.haydenent.com] and JrFuelDragsterAssociation.com