Ive never had luck but thought Id throw it out here in case anyone know any secrets??? Ive had and do have a car with a slight wiper mark where I'm thinking a blade came loose in its history I can feel it oh so slightly with a finger nail, but also it seems to have permanent rub marks from blades rubbing if you look at windshield from a certain angle Any secrets for removing?
I've tried a few polishing techniques with special pads and cerium oxide mix and no luck on anything a fingernail can detect....super fine scratches and swirl marks yes. and possibly rub marks Imo If your finger nail can trip on it then I suggest new glass
