Well, them and PVC. Spraying dye, needed a cage. Getting close to finished. Not much time to type, but pictures are always fun.
FYI, this is an explosion proof (USCG rated) marine exhaust fan for purging engine compartments of fuel fumes prior to starting the engine. I operate the booth at a partial vacuum until all the airborn spray has been evacuated, then I stick a box fan against the ground level filter to overpressurize the booth and speed the exchange of air. Hopefully it means no atomized finish escapes other than the exhaust duct, and no dust gets in.
-- _Never argue with an idiot. They'll just drag you down to their level and beat you with experience_