I was just at a big name tire shop and got looking to see what they do for their compressed air system. They don't have an air dryer of any sort and nothing to drain condensed moisture from the lines.
You might want to actually go check the compressor, usually right where the air lines come off the tank is an air dryer, I have one for my home compressor. It keeps moisture out of my air tools. Also if you paint using a compressor water droplets in the air will screw up a good paint job! If they use air tools,, be assured their system has an air dryer in it.
