The compressor should be fine, it will cycle quite often due to the small tank, but will be more than ample. I know nothing about the AB you have, but i have had the same Paasche airbrush for over 25 years, and only replaced an o'ring and a hose recently, so i will highly recommend Paasche. As for spitting, it sounds like your paint could be too thick maybe, or if your using the jar, try the cup, i find the jars are a bit temperamental. Can't help with the paints either, i only use auto acrylics. You could try a different thinner though.