You've received a lot of good advice from members here. I'll weigh in with my $0.02. I painted my car in my garage and it came out really well, so I'm speaking from some decent experience. I started with DeVilbiss StartingLine gun set. Was a good set to learn from, but once you use good equipment, you'll never want to go back to those guns except to shoot primer. I ultimately purchased some nice guns, and they have served me really well. Besides my TR3A, I've painted my wife's Mercedes bumper, a bumper and panel on my 4Runner, a bumper and fender on my Camry, and a couple panels on my buddy's Mustang. They all came out great and you would not know the panels were repainted. I shoot basecoat/clearcoat systems, typically from PPG, although I'm having to change basecoat providers as PPG is water based now, in my neighborhood and I am not setup with ventilation and heating to shoot water based paints.
I have three nice guns, and I think that's all I need. I have a DeVilbiss Tekna Copper gun with a 1.3 tip that shoots base and clear wonderfully. only 22 psi (at the gun) required and puts more paint on the panel and less in the air. Atomizes really great. You won't get high quality atomization from a cheap gun. Unless you push up the air pressure and put most of your paint into the air. I have a DeVilbiss primer gun that shoots both urethane primers and polyester primers, both which you'll probably want to use if you are trying to get your panels perfect. I also have a DeVilbiss detail gun, which is great for shooting smaller areas, say up to the size of one fender or door. That gun is great for blending on a panel, door jambs, stripes.
Get a quality gun cleaning kit and learn how to use it. Len has a free gun cleaning video on Autobodystore.com. I bought most all my hardware from Len. His prices are good but I am so appreciative of all the advice and coaching by him and on the forum he hosts - so I patronize his site. He drop ships many of his supplies, so I receive them in California in about two days. I also bought a HobbyAire supplied air kit to save my lungs during spraying these very dangerous paints.
I use a 3.5 HP compressor with a 60 gal tank. Even in dry CA, I get quite a bit of condensate in the tank and in the lines. I plumbed my garage with a pretty long run of copper with drain legs in it, so that the air can cool and moisture can drop out. Then, I split to two lines. One for shop air and one through a desiccant dryer for painting. And I have dedicated hose for painting. Let me tell you, the last thing you want is to spend hundreds of dollars on high quality paint and countless hours blocking out your panels to perfection, and then have water spray in the line, creating pock marks in your finished paint surface. It it difficult enough to do a great job without having all these problems due to hot dirty moist air.
There are some great videos available from Eastwood (Paintucation by Kevin Tetz) or from AutobodyStore.com. I watched both and learned a ton. I also did body work and paint on a couple spare panels and practiced quite a bit. I had one truck fender that I must have painted 5 times, so I could get my guns dialed in and learn how to color sand the finished paint correctly. Body work and paint is really gratifying if you take your time and really pay attention.
Pat
I'll post a few photos with my next post. Gotta run.