We have a couple of custom built rigs. Gun is spring suspended from a tripod. Compressed air gun from a retractable air line. Work station is a hollow box with a 5" hole covered by screen mesh. Inside is a industrial wet/dry vac. Directly behind it is a high speed exhaust fan which takes fumes directly outside. One switch turns on a light source, exhaust fan, and w/d vac all at once. The combination of air gun, vac and fan eliminates fumes and minimizes residual stains. Yes, we are fortunate to have a full time maintenance person who is a skilled craftsman and can build whatever crazy concepts that come into my head.