im sure its the same as painting anything else. are you planning on doing it yourself with spray cans?
just make sure you prep everything correctly (sanding, taping off everything that you dont want painted) its also very important before you paint to make sure that the area your working in isnt very dusty, make sure its dry, and depending on the paint (read label) make sure that the garage or w/e is the right temp so that the paint dries well.
don't cheap out on paint, even if you have to pay 2 or 3 times more; good paint is a blessing to work with and chances are you'll end up using 2 or 3 times less paint than you would've needed with the cheap paint ...
Belgium represent !
"The windows are vertical how am i going to poop on those?"-Killabees
"God isn't black, you fucking moron!"-Shibby
"I shit rainbows and sneeze glitter."-Arabian
as for sanding, just go get a cheapo 30$ sander and depending on the condition of your body panels and how perfect you wanna get them, i would start out with a heavy grit like 200 maybe, rub out all the gouges and imperfections with that, then work your way down to a finer 2000 grit, then your ready for primer. i would go with a self etching primer then rattle can that shit, its just gonna get scuffed up anyway.
also if you keep the color basic with rattle cans, it will be real easy to touch up if the paint chips or anything. just hit it with a quick spray and let dry.
you just wanna make sure you get a nice even coat, dont wanna overspray because you will get blotches and runs and it will look like ass. its really easy to do, google some writeups.
theres a guy on a toyota forum that painted his whole truck with a roll on boat paint, and it looks amazing, pretty much like a factory paint job. and the can of paint is like 36$ a pint or something. just google DYI paint job and read up.