I would staple or nail some clear plastic to the ceiling using tack strips, then lay out some 2X4s on the floor to staple the bottom to. The lights in the room would shine through the plastic, or you could set up some spotlights outside the booth. If you have a window in that area, set up an explosion-proof exhaust fan at one end, to suck the fumes and dust out, then put at least 4-6 furnace filters at the other end for incoming air. wet the floor, and blow it out real good, then spray.

If you intend to sand and buff the job, this is a more-than-adequate booth.