Some good advice has been given. BE SURE TO STIR UP THE PAINT GOOD! This is a given, but it is often neglected. I mean stir it up scraping the bottom of the can, VERY GOOD. Be sure you buy all the paint you need, if you go back to buy more you could get into trouble there.
Be sure to shop out the BLACKEST BLACK, one made from ONE toner if you can. MOST blacks you see are made from a formula just as every other color. Believe it or not most blacks you see on stock cars, to duplicate them may use five different colors off the mixing bank! So, YES, there ARE differences in "blacks" you see, BIG differences.
This will not affect you at all, as long as you buy all the paint you will need up front. And if you get one made from one toner it will certainly be no issue at all realistically.
Be sure you cover every square inch the same! Get around edges! This sounds like common sense, but again, missed even by the "pros" I deal with. It amazes me how a guy can paint something in a $100K booth with a $400 gun using the best materials you can buy and there are "holidays" all over the friggin thing where you can see the primer!
But without a doubt the biggest thing to painting a car in pieces has nothing to do with the paint at all! The most important part is to be sure that all panels fit properly and you will be able to bolt them together without a problem.
Again, oh, this sounds easy. But NO, my friends, it is another one missed by even pros doing it everyday. For Gods sake, TRIAL FIT
EVERYTHING. We are talking EVERY SINGLE PART. What you don't trial fit, that part you think, "Awwww, it's brand new, I don't need to", or "It fit before I did all the body work and I didn't even touch it", or "My brother who sold me the car said it fit", I don't care what the story is, I don't care, THAT is the part that will be all chipped to hell because you couldn't bolt it on after painting without a wrestling match.
TRAIL FIT ALL PARTS.
Brian