Hi@all has an A6 in black metallic the Vorbestizer has apparently washed the car very often. Now especially in the sun there are a lot of washing machines scratches to see. I wanted to prepare my car properly now. There are so many different polishes and recommendations there you don’t know what to take anymore. I heard that the products of Koch Chemie should be very good and also use car conditioners these. Who has made experience with it? Which steps should I go 1. Washing a car 2. Polishing 3. Polishing Scheifpolitur 4. Polishing again 5. Then sealing with wax Which grinding polish should I use best then? There is sanding paste and fine sanding paste.http://www.flowmaxx.eu/Painting care/Profi-politures/ Greetings Dan