most airbrush hoses should terminate in a 1/4" female connector. if the one on the compressor is 1/2" there are adapters to get it down to 1/4" at the local hardware stores... just explain what ya need. You'll need a 1/4" NPT male connector on the airbrush side. What airbrush do you use?
if you have a regulator it shoud do, I do recommend a hobby style pressure gauge which you can get from most stores that carry airbrushes or order it online from
squadron.com or probably
greatmodels.com, the industrial one will get you by until then though, you'll just have to "guestimate" what pressure you are spraying at as it is incremented in 4 or 5 PSI instead of 1psi.
I also recommend a moisture trap, you can get those at the hardware store where the air compressors are, the one I got at lowes cost about 19 dollars but I just saw it at Wal Mart for 11.95 so you might want to stop there if you have one nearby...
good luck!!!