I happen to have found this spot in the paint under the window (middle height of the door). Diameter is about 3-4 cm. Then white paint shimmers through, so no rust visible. Does anyone know what this is and what I should do?
I happen to have found this spot in the paint under the window (middle height of the door). Diameter is about 3-4 cm. Then white paint shimmers through, so no rust visible. Does anyone know what this is and what I should do?