Hi Blackwolf, it is the glue, damn glue spread the whole rear sedan window, it is not flakes, I scrapped some of it between the lines to see..Very different glue type. The customer took the car for roadworthy appointment so i still need to figure out what to do til next week.. I Have tried all glue removal and iso to test the glue, but no success, I intend to use steamer and both steaming and scrap glue at the same time. Not sure if I would work a bit better or not.. this is winter over here in Melbourne.. I don't think black bag would work and I never ever used it too .. but thanks for the suggestion!