HMM, build it on a small trailer, with a fold up wall so it's sealed good.add a ac unit squirel cage fan to suck out the top with some cleanable filters and baffels,along with some vents around the lower half and 2 led shop lights inside.so you can close it up if needed and blast your ass off( with resprator&protection of corse) and yes some more thinken.let the wall down when it's ok to blast that way.