I can only go by personal experience regarding Standox...
We went through many color chips trying to find a 'correct' match for that ugly Chrysler purple...
Standox nailed-it...
Holding-up well after 20+ years...
I'll endorse it...
(And this)...
'Standox® has more OEM approvals than any other automotive coatings supplier in the world, which is the ultimate stamp of quality.'
Acura
Audi
BMW
Chrysler
Fiat / Alfa (Group)
Ford
General Motors
Honda
Infiniti
Jaguar
Lexus
Mazda
Mercedes
Mini
Opal
Porsche
Renault
Seat
Skoda
Smart
Toyota
Vauxhall
VW
Volvo