Moinmoin, I already had a bottle of disc polish in the cellar since December and used the nice weather yesterday to test it. So first carefully started on the rear side windows. Looked good. Then all the windows and the headlights. Also looked good. Then off into the washing machine, water pearls 1A off, now I just have to look what it looks like during the ride. Last night under a lantern in front of the front door it looked as if the whole Sche ibe has slight scratches from the polish, but I don’t know what that looked like before. Actually, this is supposed to help exactly against scratches. Has someone tried that too. Mine is Clearview Z-Polish from Devilgloss. Not to be confused with a disc seal! Greeting Markus