Hello all - I'm a GP guy but I've been browsing the other sections and found this posting;
I'm also into Oldsmobiles; I would say that at least the Olds HQ plant in Lansing, MI could do the firemist paints. I found a 69 Cutlass W31 on ebay that was painted a special order - a 68' Cadillac Monterey Green Firemist; the ebay ad does have the documentation scanned - and the car doesn't seem to be high-dollar enough to be faked:
http://cgi.ebay.com/ebaymotors/1969-...item2ec12226ea
The car is obviously really rough - but hopefully this helps on the firemist paint question.