Where I live I aggree with Joe, the bugs pollen dust and what ever you can think of would make It impossible for me to hang stuff outside. I don't have a spray booth yet either, but something I have been doing lately, is I have a small utility room attached to an open carport, the door between the 2 has a insert I can open to let the fumes out. I hang the cue near the door from a hook in the ceiling with a piece of string and a clasp that open and closes. If I'm spraying the shaft at the same time, then I use one of those rubber shaft hangers for straightening, to hold the cue by the ferrule, and attach it to the clasp in the ceiling, then wind the string up so it spins, and spray up to where the finish ends on the shaft. It only spins for a short period of time unless you keep spinning It by hand in the procces, but the finish I'm using at the time flashes really quickly anyway, so I have had no issue with sagging yet. I wear a mask, and clear the room in between coats as to stay out of the fumes as much as possible. I have put ca on the way Joe mentioned, but have not tried It with urethane. That sounds like something I might try if able to keep the fumes down.
Greg C