You can’t polish a turd, but can you sully a diamond?
1953 Studebaker Commander Starliner
Once, whilst Europe was happy to go on producing the same identical model year after year, until the dies got too worn out to function, the US doggedly changed models every three years, with a facelift every year in between. Thus, any reasonable US car spotter will be able to identify the exact year of a Ford Thunderbird, first by the shape, then by the radiator trim or the rear lamps. Any manufacturer who didn’t come up with something new for each season was not going to be taken seriously.