Hello municipality, I hope in this themed forum I am in the right place with my problem: We drive an “Opel Astra H 1.7 CDTI DPF Caravan” from 2008 (KBA2: 0035 / KBA3: AHO). The color is starsilver-metallic (color code: Z157 XXVM). At the edge of the right rear wheel run and the complete lower edge of the right rear door the lacquer/clear varnish – slight corrosions are already apparent. The previous owner has already done two painting work at these places, but after the cold winter months “resolved” again and again under the clear varnish. On the pictures you can see details What can be the problem that always after the cold winter months these old rehearsals appear? Well aware that a statement without direct consideration of the car is difficult: Is there still the possibility to carry out improvements via “smart repair”? Can anyone recommend a painter in the area Cologne & Rhine Erft circle?