The Uno Matte single stages hold up really well. On one of our engine bays, it hasn't marked from tools, fuel splash, coolant, or repeated washing with soap etc and a sponge for car shows. It was only two med. coats on top of an epoxy primer.
Here is a link to the line. Your supplier will be able to tell you what colors etc they can mix. No metallics, solid colors only.
http://www.rmpaint.com/product_offer/uno-hd#1