Had a similar problem with a 2000 Accord I bought for my dad. The left rear door had some "cloudiness" in the upper half. Thought it was some tire dressing that smeared onto the door. After many attempts to buff it out I realized it was in the clearcoat. Decided it wasn't bad enough to risk the dealer repainting so left it alone.
As for your bumper, the "skin" or painted part is very easily to replace. Since its a new car, I would demand a replacement instead of body work. I can't imagine the labor costs of repairing to be less expensive than replacing it?
My argument would be if I wanted body work, I could have paid less and purchased a used vehicle. If you scream loud enough they should meet your request.
If not make sure to tell them how many people you work with that might be considering purchasing from this dealership and how you will be sure to tell them ALL about your experience!
Good luck I know how frustrating it is deal with these guys.