fancy_muskrat

i bought my 2000 honda used certified car in 2002 only to discover a year later that the paint was chipping off. apparently, the vehicle had been in a collision and received a super crappy paint job that the inspectors at honda did not catch. the dealership paid for the repair. fastforward to today: i notice that the other side of the car (front passenger door) is rusting. i take it to a body shop (the same one i went to for the first repair: a great place) and they take the door off and discover that the door was clearly in a collision and was basically glued back together instead of actually replaced. because the work was so crappy, this has led to leaks in the door (now rusted) and even the door joint was involved in the original collision because it too was kind of haphazardly repaired. how do i get the dealer to pay for this? am i right that a door like this should never have passed the inspection and become certified? how do i prove this?