I've seen a bit of discussion on this subject about the neurological hazards of the various solvents which are part of Imron (and other paint systems) but it seems that no one has addressed the high lead content of that paint's formulation or the on-going catalysis which is part of any two-part paint or resin system.
Back in the 1980s when I was spraying boats, Imron contained a fair amount of lead. We had to be particularly careful about wearing respirators not only when spraying but just as importantly when sanding Imron. I don't know if Du Pont has changed the formulation of the current version of Imron in regard to heavy metal content, but I think it's well worth remembering this bit of info if one is refinishing an object that has been painted, perhaps years ago, with Imron. Environmental consideration should also be given to appropriate containment and disposal of all sanding or blasting debris. The high lead content is/was what makes Imron the preferred choice for high abrasion applications such as aircraft, large trucks, ships, etc.
A further consideration is the two-part nature of Imron. Like all two-part systems undergoing extended catalysis, it's best not to have Imron kick off inside your lungs...
George Albaugh
Bowie, Maryland
USA