David/Rob: If you get these cans done and God knows you'll be doing other colours, have the store make you a "draw down" card of each colour. This is an approx 5" x 8" card with a large sample of the paint applied to it. They will also put the formula on it for future use. It's also helpful to make sure the colour is spot on next time you order paint. Do this for all your colours!
"Tricks of the Trade"
Robert