Thank you both. Jawal (sp) has cyanide free 2k. It says it dries like oil based and treat it similarly.... they also do a heavy duty tractor paint - don’t know if anyone’s seen them?
It's isocyanate, not cyanide. If it was the latter I'd have been dead long ago - I was working in the trade when it first came out in the mid 70s. http://www.hse.gov.uk/pubns/indg473.pdf
Scroll down to page 3, 'Table 1 Some common misconceptions about isocyanate'