Vantaaj: Great post. Thank you!
I recently talked to a car painter who has worked on more than one continent. He swears that results of the same paint systems (sold under the same name by the same manufacturer) differ in North America, Europe and Asia. He said he excluded any environmental stuff (temperature, moisture, elevation, etc.) and believes that different formulas are being used (even for water-based paints) due to environmental constraints.
So, it seems sensible not to buy into any general manufacturer or paint system religion. Run tests to see what looks best. Trust your painter's experience (else you're in the wrong shop to begin with).
[SIZE="1"]'63 2600 Touring Spider (AR 191437, the car that started the 2000/2600 International Register, reassembly in progress)
ex-'65 2600 SZ (AR 856043, the car in my avatar, sold as resto project to Austria)
Maintainer of a private 2600 SZ register (not the one in the Netherlands).[/SIZE]