Rust problems on the mini?

Hello On the weekend I polished our Mini Cooper S and encountered small bumps in the paint. As I looked more closely, I realized that the paint “blossoms” not at the edges but in the middle of the sheet metal parts. On both sides the rear plates between the door and the wheel run are hit, as well as the passenger door. There are several spots to recognize, on which the paint shows itself in about 3 mm large points really blooming. At a “pickel” I scratched once and already bl Yesterday the vehicle had to be inspected, and then I immediately approached the workshop master and showed him the jobs. Someone from the advertising department was called up and now it is to be advised internally how to proceed… The vehicle is by the way first registration 06/2008 and in my opinion a garage car must not start rusting after just two years…. Does any of you know these problems?