Yeah. I have more or less the same advice others are offering.
If you are using spray paints make sure you practice so when you start spraying you don't have spots that are saturated or darker than others. You're misting basically not painting. Also, if you have an airbrush investigate the fabric paints. I used something similar with my airbrush when I helped a friend redesign a messenger bag of hers.
-=QuinN!