As others have said, you will need a clean place to paint, where there is no dust floating about. You could rent a spray booth that would take care of that, although that would drive up your costs. I highly recommend you get a respirator, or at least rent one, if it's possible. I really like Urethane paint, because it is glossier and much more durable than all other paints, although it is deadly to breathe in the spray, so then a respirator is mandatory. I would try painting the car in sections if possible, in order to minimize that dry overspray onto other panels you already did while you are doing another. Plus, you only have so much time anyway. Spraying paint is an art. I suggest you get some practice on other things first, just to get the hang of it, so if you mess up, you wont have a big mess you NEED to clean up and redo because it's your car. The trick is once the gun is dialed in right, to hold the gun at just the right distance to the panel, and to master how fast you can move the gun while spraying the paint under whatever conditions you are in. Move too fast, and the finish looks matte and you will have to sand it smooth. Move too slow and you will get it too wet, and it will cause a run you will need to sand out. Runs are a worse pain than sanding it if it's a little dry, so it's always better to lean in that direction if there is any doubt. Different temperature and humidity will affect how the paint sprays, so all of these factors will affect the quality of your finish in addition to getting the gun set up right, and making sure the paint is thoroughly mixed before painting. May sound basic, but when I had my car painted at the body shop beige, when they got to the bottom of the can they realized that there was an excessive amount of brown pigment down there, and so the WHOLE car wasn't really the right color, which meant that the correct touch up paint, properly mixed, wouldn't match. They had to repaint one of the fenders, and THAT paint was properly mixed, and you could see the difference.
Fortunately, you will be spraying an extremely forgiving color, white.
Incidentally,a lot of the time, panels aren't stamped perfect at the factory, and they may have waves in them. Again, this won't show up much on white, but if you want it perfect, you will have to consider whether you want to do any minor bodywork, like using a little filler to get things absolutely straight. To do that you will need an extra long sanding block, like 2 feet long, to ensure straightness. When you really want to know if something is straight, you spray a light coat of a different color on the car, and then sand it down to see if there are any hills and valleys. Typically a car will be in primer and then painted a light coat of black to reveal the low spots.
not thrilled about that part. I'd rather just do it myself.
