Importantly: THIS IS NOT A POLISH! It is more comparable with wax, which is applied to the polishing / cleaning - but lasts much longer than wax. So: Cleans before your vehicle thoroughly. Carry ONLY THEN Liquid Glass on. Multiple layers of actually forming a kind of glass layer. Lest you best before you buy the operating instructions, since many helpful tips are also what you would expect from the care product / allowed and what is not.