I think automotive paint is a whole different story which has to do with Isocyanates, a chemical introduced with the advent of chemically hardening paints. Apparently people have died upon first breath of the stuff and there are many rumors of modern auto paints significantly reducing your life span on auto-painter's forums. All of the paint manufacturers say to use an expensive fresh-air supplied face mask with iso paints.
What was scary to me when i was painting cars is that i could smell the plume of invisible paint overspray and probably bondo dust downwind from our shop. Another thing was at the probably 12 or so shops I'd either been in or worked at, none of the painters used positive-pressure, fresh air supplied face masks. We all just used the standard 3M's against manufacturers directions AND Washington State law. This is in Seattle people... SEATTLE! hehehe