Hello guys, does someone from you have experience with the caravan cleaner & special concentrate, which you can buy at ebay, among other things? Unfortunately I didn’t have a smooth outer skin on my WOWA, but this nipped. And the surface has become a bit matt over the last years. I tried it once with autopolitur, but that can be practically forgotten with the structure… Besides, it is not exactly a pleasure at 5,80m build-up length… How do I get the outer skin again nicely shiny and clean? Does the miracle remedy help (e.g. article number: 7954680953)? Greetings and thanks for your tips… Totti