Bath tub...genius. I've tried making a little painting booth out of 1 mil plastic tarps and using fill bazookas but this idea never occured to me. I do have to add though...if you spill this stuff on the floor..use the longest vacuum hose you can find have the vacuum at LEAST one room away - next county if possible before turning it on. the exhaust from the vacuum blowing down all over is what got me sleeping on the couch priviledges for a couple of nights. My wife nicknamed down the herpes of sewing rooms - impossible to get rid of once it's taken root.