Powder coat!! The high heat paint dulls over time. Also be carefull with the rubber boots. I tore one and there were only something like 6 of them in the country. It took gm a while to get me one!!
The piston boots / seals were all TIP TOP, But one of the slide pins must have been vice gripped at some time, and the boot was torn ...
Got a new pin from NAPA (2 actually), and the boot "kit" (4) is on the way ... 2 weeks !
This is pretty close to what I'm going to do:

~Hop