Hello friends and enemies, I have a topic of my own now, apart from all disputes about exhaust noise and water cooling: My PZ has its own department, in which 3 specialists do not carry out complete painting work, but e.g. rim repairs and fine work on vehicles, which otherwise does not do normal painting operation. Among other things, even the Ferrari and Maserati representative here places a car there, when a particularly tickling thing is at hand. They suggested to me yesterday to seal my (almost) new (black A1) 997S with Teflon. This means that you simply rinse dirt with the high-pressure cleaner, you don’t have to grow any more and the black car shines even deeper than already. Machine wash must not be premature, but it doesn’t get anyway. The windows have to get a nano-sealing, because Teflon does not adhere to it, still the (even with hand wash inevitable). n) Mini scratchers are polished. The whole holds then 5-6 years with gentle handling of the car, guarantee there is 3 years, a post-treatment there, if necessary, for 150,- €, first treatment approx. 500 €. I have never heard of Teflon in this application and would be pleased about a advice if someone already knows it or has heard of it by acquaintances. As said, the makers of this story are known as highly qualified specialists. For every advice applies: May sometimes on 99 7S exhaust listen if he likes and in any desired flap condition! Greetings Klaus