Ceramic coat them. NIC industries has a great air dry system with several different colors. Good to 1500 F and clean up is a real snap when its dirty, even valve cover leaks on to the exhaust flanges. WD-40 even beads up. I didn't go for a blue, satin silver look is what I was after on the heads. Very pleased for a "do it at home" job. 800 miles and it still looks just like it did when I sprayed it on. I've done several other components now with great results and durability. This stuff is tough, really tough.
