I have a good friend that retired recently, lucky bastard, and built himself his dream shop, lucky bastard, to work on his auto restorations. Doing this kind of work he needed tons of air to run all of the tools plus paint guns. He installed a huge compressor to keep up with all of his high volume tools and he plumbed the shop with 1" PVC pipe. When I questioned him on the safety of the PVC he pointed out that what he used was rated at 200+ PSI and that he had it regulated at the start of the run to under 100 PSI. His setup is pretty slick with main trunk line being about 4' off of the ground with a quick connect anywhere he thought he might need one. He has several drain T's to drain mositure all around the circuit and he installed a large dryer at the head of the run. The leg that runs into his paint station has yet another dryer installed as insurance.
Doc, since you are going into more or less a permanent shop you might consider running some permanent plumbing and making your life easier. You could probably do it for less than $100 and you wouldn't constaly have air hose laying under foot.