Monona,
 
My  Worthy Opponent:
 
Are these artrists doing electroplating with large-scale cyanide salt baths?  If so, why?  What kind of art needs  that, or,  (in the words  of Robert A. Heinlein) only requires a blowtorch and astigmatism.  Rodin did it much  better (although one might wonder about dusts from the chiseling).  There's some older data from Turkey and Italy about the potential for chronic cyanide poisoning, but I find it rather unconvincing.  We do have some anecdotal cases of multiple subacute cyanide exposures from the gold/silver mining industry where perhaps there can be a sort of ill-defined diffuse encephalopathy, and of course in serious poisoning cases (almost all suicidal overdoses resulting in coma and required ICU care with ventilator assistance) there can be either a diffuse encephalopathy or specific lesions in the basal ganglia which produce a Parkinsonian-like syndrome which because it's the other end of the neurotransmitter feeback loop does not respond well to the usual anti-Parkinsonian medications.  Thre's probably less than 20 reported cases in the world's literature in any language I can read.
 
Good idea about a liason with the nearest ED and they should (but perhaps based on some research out of Denver) may or may not have either of the FDA-approved cyanide antidote kits -- well to check before an incident occurs -- (and I have numerous reservations about the FDA process and the Package Insert for the Nithiodote(R) version from a generic outfit in Arizona, but it apparently is available but only has single doses of IV sodium nitrite and sodium thiosulfate not amyl nitrite inhalers).
 
Naturally, cyanide salts + acids generate HCN vapor that's how the old San Quentin Gas Chamber worked.  And please don't ask me about the legal nonsense that surrounded that one -- things best forgotten.
 
Good idea also about the data sheets.
 
Alan
Alan H. Hall, M.D.
Medical Toxicologist