There are several different styles but most are similar to the one here
http://www.caswellplating.com/buffs/arbor.htm
The manifold started out to be polished for anodizing but the guy changed his mind and decided on PC. I took the Elderbrock name and model off with flat pads and worked the crannies with cartridge rolls. The runners were sanded to 400 grit and very little buffing done before PC. The look it has comes from the smooth surface and I slow ramped the temp to get the most flow out before it started to cure.
SS