here in Phx, last December I finished my first guitar in nitro. I generously cleaned and vac'd my shop very clean then lined the walls, cabinets, shop tools, in 4 mil sheeting. I sprayed my pieces using a small step ladder as a tree to hold the pieces just inside the door leading to the yard.
I've found with nitro and at the fast rate that it kicks, I obtained a fantastic finish by painting one side of a body for ex., flipping it upside down so no dust or bugs to settle down into the wet surface, waiting a few minutes for it to flash to a point that anything that may land on it will easily remove once fully cured, then spray the other side repeating the process of inverting it once finish is layed on.
If you tend to spray with a heavy hand than this process will probably net you some paint runs, but if you're using a moderate to light coat then I've found it to work well. I obtain cross ventilation by having the overhead garage door and the side yard door open during spraying then close them when not to stop the air flow and the increased chance of foreign material finding it's way into the finish. I layed drop cloths over my bikes and parked the cars outside away from any flow of over spray. This is an Opie Taylor way of doing it but it worked very well, and the weather here is great for painting.