Didn't Imron use isocyanates? You could have had your own little Bhopal reenactment. Isocyanates don't affect everyone the same way. Some companies that spray bed liner used to have almost no protection for the workers. It usually worked okay for most people, but some workers would end up with essentially untreatable asthma. It usually takes a couple of days of spraying.

I have thought about hanging plastic sheeting in the garage in my wife's parking spot. She's a very forgiving person. There are car-sized inflatable painting tents, but they cost real $$. And one I saw was basically a party tent with sides and a floor. That would be nice, but it was almost $300.