Paint Booth Ventilation

[RyanT]

I only have one window in my basement and that window opens up to an area outside under my deck. The deck is about one foot off the ground and is enclosed on all sides. Obviously the space under the deck is not air tight, but would this be too much of an enclosed space to vent into? 

[Bainford]

I don't see a problem with that. It's a ventilated area, and even if poorly ventilated, the small quantity of volatile material discharged from an airbrush will have plenty of space to dissipate. I think you're good. 
If you do A LOT of painting, you may want to open up a moderate hole on opposite sides of the deck skirting to ensure good ventilation. 

[RyanT]

Thanks for the quick response. I'll just be doing a 1/25 car here and there so it shouldn't be too much volume.