I did the bottom half of one in my driveway this past spring. Turned out REALLY well. Make sure you have nothing down wind when shooting. This stuff stays wet for a while in the air and will stick to anything it touches within 100 ft. of where you're working. I wouldn't even try shooting in anything over 5 mph or so.
I used a gallon of acrylic enamel (suggest a solid color paint, no metallic!), and fast retarder to avoid runs in the cooler weather (45 degrees or so). I also added some stuff to prevent fish eyes. Cost of paint materials was about 250.00
Equipment consisted of a small 1.5 hp compressor and a gravity feed HVLP gun run at 40 psi. The compressor struggled to keep up with it, but it did manage.
I divided the areas to be painted into 4 areas for shooting purposes. First 2 took a day apiece, second 2 were done in a day because I had a better idea of what I was doing.
I removed a large compartment door to practice on, and ended up sanding the paint back off of that twice before getting the process down to something predictable, that I could repeat when I got outside. I actually think that was the hardest part of the job, other than maybe prepping the surfaces to the point I could spray with no dust showing through.
Do you have any experience with spray painting? Though not a pro by any shape of the imagination, I did have the advantage of having several pretty good size projects in back of me prior to starting into this one. Without that, suggest you find a paint dealer that will give you a hand setting the gun up, explain mixing ratios, etc. We're lucky enough to have a small mom and pop store within easy driving distance. They've been invaluable when I get into trouble with paint issues....