That's very interesting and good to know, I painted an older Camaro a while back and it was laquer, thermal set laquer apparently. Interesting that the different companies used different paints.
GM used that **** because it flowed out so well in the bake cycle. Their finishes were consistently better than anyone else`s.
If I recall the GM St. Therese plant and GM Saltiilo, MX plant were the last to convert from the old lacquer system. Both plants jumped to low solids polyester BC- CC systems. (similar to the BASF Diamont)
Man, that crap gave my in-plant tech service guys fits and me too. If the final finish repairs (repaints) weren`t baked properly the stuff hazed over within hours. It also created field problems as well.