IMHO, BASF Glasurit (OEM) is the best. I have shot quite a few cars with it and while it can be difficult, there is no comparison on the final product. For a more ecnomical choice, RM Diamont works well too. I have not used PPG in some years so have no current knowledge of their quality.
PPG is fine paint, and a lot of people make fine paint, the idea being to buy the premium line. Your bigger challenge is application, spraying and blending, etc. It is clearcoated or single stage?
PPG is a factory approved paint supplier (attachment). For someone to claim that it is better than the factory paint you would think they would be using a top of the line product.
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