When i powder coat the foot peg brackets i sell the oven has to be 400ºF for the powder to bake properly. It jells at around 170º which means that the powder goes from powder looking to a shiny finish and flows/fuses. I'd ceramic coat them as powder coat would definitely get soft and any road dirt or debris would get embedded into the finish. My other bike has the pipes ceramic coated in silver and also the turbo housing has been coated and they still look good.
Yes i did say turbo! I have a 1982 Seca 650 Turbo.