I finally resorted to installing an RTI E4000 Eliminator II, inline from the main shop compressor, at the paint booth. I spray high solids acrylic lacquer with dyes, and it was a constant battle between ambient conditions and moisture in my line, especially in the 100% humidity 90+ degree summers we have here in Michigan. No more blush or contamination. It was worth every dime.
I keep my 25' hose attached to the regulator at the dryer, and switch from my paint gun to my airbrush hose as needed.