Just make sure to practice spraying with it before anything goes on the car. I had a gun that was junk, when I started spraying with it, it gave me a bad finish, a lot of orange peel. I eventually figured out what was wrong with it, just poor manufacturing. I just drilled the tip out to 1.8mm and made it a high fill primer gun, since that stuff has to be sanded anyway. I ended up buying a 1.4mm Astro Evo LVLP gun. It uses much less air and lays on more paint, and it was only $85.
Here is test for you gun and compressor. Hook up the gun set the air pressure at the gun (the recommended pressure for your gun), and pull the trigger, let the air out untill the compressor starts to run. stop. Let it charge up until it stops, then as soon as it does, pull the trigger on the gun while timing it with a stop watch until the compressor starts to run, make note of the time, but keep timing it and keep the trigger pulled, now time how long before the pressure starts to drop at the gun (more than 2 psi than previous). If your compressor charges up and stops while you have to trigger pulled, then you can stop the test, its more than big enough. If it never stops, then keep timing it until the pressure drops, make note of that time. stop pulling the trigger, But keep timing, now time how long before the compressor charges up and stops running.
Here are my results:
Trigger pulled, before compressor starts: 4 minutes
Trigger pulled, pressure drop at gun: +7 minutes
Recharge time, trigger released: +3 minutes
What this tells you... I can continuously paint for 11 minutes before my spray pattern changes, I can rest for 3 minutes, then start again. Realistically, you don't keep the trigger pulled continuously while painting, when I sprayed primer, I could have sprayed for about 25 minutes before I stopped, but I was burning through a cup full of 18oz of primer in about 10 minutes. I could spray the whole body in about 15 minutes, so for me, my compressor is plenty enough for my spray job. Another test you can do simultaneously, while doing the above test, fill the paint cup to within 1/2 of the top with DISTILLED water and time how long it takes to empty the cup, if the cup empties before the test is up, then you have noting really to worry about, because you will have to stop and refill the spraycup anyway.