All cars are repainted several times by the time it gets to you as new. That's simply a fact. They get knicks, dings, chips, dents and worse in the transport process. I know this from working with the international shipping ports here for the various car manufacturers, both incoming and outgoing. As well, most of the dealerships in the area. I do all the permitting for painting operations in the state.
That said, you do have something to fear, and that's the body shop side of the dealership. A whole lot of them absolutely cannot grasp doing small repairs correctly, and will instead paind the whole door. Those jobs are normally poor. However, the higher end dealerships all have a relationship with the touch up guys like Colors on Parade and such. They use air brushes and the like, and do tiny undetectable repairs on the little dings and chips. The body shop foreman tends to hate these touch up guys because they take business away from them.