99% world wide fake glass coating products are black smoked, non ashe remained .Real inorganic glass coating product remained a lot of white sio2 ashes and unreal glass coating material makes black smoke and almost non ash remained ,because it has no sio2. WHICK ONE IS REAL GLASS COATING? RIGHT ONE? OR LEFT POMPONAZZI? Only Pomponazzi has the goverment sio2 % certification. Pomponazzi glass coated layer thickness is 20~50 times thicker than any other glass coating products.