My airline comes off a high quality oilless compressor, then is triple filtered with submicron filters. An optional antistaticn (negative ion) low-pressure gun is available on a branch line. But mainly I depend on a big old industrial air cleaner which actually
develops a static charge on an internal bank of copper plates to attract dust, then
removes the charge on the air out. A different principle than most current air cleaners,
more effective, and probably too expensive to market nowadays given the price of copper.