I have a scratch on the rear window of my Megane-III. Lt. Carglass and my dealer would help here only an exchange of the rear window. Cost point 560,-. Since only aesthetic damage, no insurance case. I resist taking so much money in my hand for the aesthetic upgrade of my Meganes, and would first consider any other means, e.g. polishing. Result does not have to be perfect, slightly less conspicuous is also sufficient for the first time. I need such equipment, or are there workshops that can take it from you? Thank you for your comments.