I am looking to buy a new compressor and was wondering if a 3 or 6 gallon compressor from Home Depot or Menards would work with airbrushes. I have not seen any with a moisture trap but they do have a screw on the bottom to release air. Do you need to attach a moisture trap and do you need fittings for the air brush hoses? Just want something that is not running all the time. Thanks

You'll need to buy a regulator and probably a few attachments to get the correct fitting for your airbrush hose. You can find regulators that have integral moisture traps, and I would recommend that. In addition to that, I also have an inline moisture trap on mine.

The larger the tank, the less frequently you'll have to run the compressor. Do remember that most 'garage compressors' are quite a bit louder than small airbrush compressors, so when they DO run, they can be obnoxious. I have an 8 gallon, which I'll fill in the evening before the kids go to bed, and then airbrush off that at night in silence. If I do run out of air, I'll just change over to my old quieter airbrush compressor rather than let the big one click on and wake everyone up.