The risk in taking it could be as "minor" as the clear coat delaminating in a few years or, since the dealership wasn't able to explain what the problem was in the first place or even present when the damage occurred, a more significant issue with the paint.I’m a dissenter here this sounds like a minor paint issue that has been resolved so likely would not wait. What is the risk in taking it? Maybe the new car will have some other problem.
Another car could have some other problem but you're accepting one with a known problem. Using your logic, cars that have been in accidents and fixed should have price premiums over ones that have never been in accidents.