Moin, I bought my Golf 4 3-door with an “accident damage” (see picture 1) behind the passenger door two years ago. In order to repair this damage I tried to get the dent out as far as possible. After that it was still about 2-3cm deep, that I then filled with spatula and then, the first time, the can painted. Unfortunately, the place then burst up and crumbled again, the second time, everything got out again and again with polyester spatula. l leased, let it dry for 3 days and then painted the whole side with spray varnish and gun (we sprayed the metal and the finished one with primer). This has now held for about half a year and now also starts to travel again (see picture 2). Can someone tell me what this is about and what I can do better? Greeting Niclas