what color should I paint my suspension?

First off. No powder coating. I spent some time on a truck forum, and some folks there regretted getting there frames powder coated. I'm not saying powder coating is bad, but paint can be touched up easy.If I were you, I would look around locally for paint, and then research the brands you found. Here a link to a thread that talks about frame paint: http://67-72chevytrucks.com/vboard/showthread.php?t=371828