I have a 30 gallon, 6 HP 150 PSI Craftsman air compressor, and I was planning on painting a car or two with a HVLP gun. It's been recommended that this compressor is too small, that a 50-60 gallon one would be much better, I wouldn't need to stop and wait for the compressor to catch up. Can I add another tank to the compressor? How about external ones? 2 of the HF 10 gallon tanks would only set me back $75 + plumbing, and give me 50 gallons capacity. I think the compressor has enough power to do so, but I don't exactly know the mechanics/physics involved in power vs. larger tanks.
It would also be nice to be able to run my cutoff wheel wide open for longer than it lasts now, as well as a bunch of my other tools.