You sure that's not a ding caused by a rock or something?
I hear ya on eyesores, though; mine is in the form of a 3" scratch on a bug deflector, but with the laws of physics and other stuff, these things are probably inevitable even under the best of conditions -- it's normal to wish that a car came with a deflector shield like the USS Enterprise so that the body remains new and holds up value for longer...
I honestly wouldn't call the dealer on it. That's my opinion, of course, and they too might (or might not) pawn it off as saying "a pebble hit it".
Two cars ago, I bought a car and 3 days later a pebble crashed through the left headlight...