Moin, I recently bought a used one. During the visit I had noticed a damage on the door sill. There was the bare metal to see. I guess something hard druaf fell, not quite 1cm tall. The seller said he fixed that and just peed over it quickly with a paint pen. Unfortunately, I did not realize that because in the meantime the car looked further on. Now it was too late. My concerns are now, the s maybe the place under the paint rusts there and I thought I would kind of grind that away again and first put a primer on it and then paint again. However, since I am inexperienced, I would like to get some advice. Should I leave it that way, because “nothing else will happen anyway” or should I take care of it? I would first stick the place off and then work manually with coarse sandpaper, then still with fine afterwards and clean everything before I prime the primer g on it brush.