Yes - there are some strange exceptions - some cars are premium and have no number and cannot have a number added e.g. Renault 8 Gordini and Art Morrison Corvette, some cars are premium and have a blank white space for a number, but no number and no way of fitting a number e.g. Shelby Cobra Daytona Coupe, some cars are premium and have a number, but you can't change it such as Ferrari 250 GTO, Ferrari 330 P4 and Ford Mark 4 - looks a bit silly when you are racing those cars and everyone has the same number!
We want to be able to fit a number or change a number on all premium cars PD!