RoyBoy posted:Paasche model H is the one I use. Medium/low cost and easy learning curve.
I second that one. It wasn't overly expensive, easy to use and easy to clean. I paid a bit much for my compressor ($150) but I bought it specifically for its small size, a decent tank, good range and it had the water trap and other items included.
We made a spray booth at the club using a surplus exhaust fan and some plywood on a metal shelf (we line it with newspapers when in use), but I bought a large Paasche spray booth for home use (it's nice and supports O scale diesels just fine).