Thank you, Monty!
Polyester paint is what we call basecoat car paints here in Brazil.
They work in conjuction with a clear coat afterwards.
The base coat dries to a matt finish and has no mechanical resistance. The 2k clear coat can be wet sanded and polished.
https://www.hotrod.com/articles/ccrp-0709-automotive-paint/
In this link they refer it as a BC/CC system.
For airbrushing, the paint needs heavy thinning and a spray booth.
I'm not sure, but I think Zero Paints use these paints.