Another thing you may want to consider is Jet-Hot coating. This isn't for say, the distributor cap, but it would work great on the valve covers and manifolds. I am going to get my valve covers coated flat black, and get the manifolds coated (they do it inside and out) the "sterling" coating, which is a shiny silver color. It is a heat resistent coating, and won't flake or chip and will reduce engine compartment heat. I have also heard this being used for springs, and suspension parts...you can coat about anything with it, so long as you don't need fancy colors.
www.jet-hot.com