There are a whole lotta assumptions related to the New Car Purchase thing...dealers assume people don't care about marring and will just take the car, customers assume they *have* to accept the car marred or not, and most everybody assumes that all cars have marring anyhow (if they even notice it in the first place).
IME dealership guys are mighty surprised when a customer refuses to accept delivery, especially over stuff like this; interesting conversations can ensue
And in the OP's defense, I bet it's pretty rare for somebody to really know *how* to inspect a car for marring. Think of how many times *even here* we have to explain that only certain lighting conditions are really conducive to a thorough inspection...more often than not people think things are OK until they see the vehicle in bright sunlight or under some weird lighting at night and then it's suddenly
