Rob, in the circles I travel, industrial painting usng the same type of coating had inherrent risk while spraying as well.
Isocyanates are easily inhaled as well as absorbed through the unprotected skin and mucous membranes.
Guys who used to piant with this stuff had to take regular blood testing to monitor exposure levels. 
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3RD Echelon Wksp
1968 M274A5 Mule Baifield USMC
1966 M274A2 Mule BMY USMC
1966 M274A2 Mule BMY USMC
1958 M274 Mule Willys US Army
1970 M38A1 CDN3 70-08715 1 CSR
1943 Converto Airborne Trailer
1983 M1009 CUCV
1957 Triumph TRW 500cc
RT-524, PRC-77s,
and trucks and stuff and more stuff and and.......
OMVA, MVPA, G503, Steel Soldiers
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