Mainly for slight marks on the paint surface (such as nail marks, shallow rubbing marks, sand marks, etc.) Deeper scratches (without damaging the paint) can be used for a few minutes if you apply more force. Adopting Advanced Nanotechnology: Car scratch cloth using safe formula with nanotechnology, no pungent odor, no poison, no corrosion and won't mess up car paint. Clean the scratched surface before use, after the surface is dry, remove the repair cloth and wipe it on the scratched area. Package Included:4 Pcs*Car Scratch Repair Cloth Notes:If the repair cloth has fallen to the ground with dust and sand, please do not use it again to avoid causing 2 scratches.Not washablePlease allow minor deviation due to manual measurement.Please note if the scratch is too deep, it wont magically vanish it , it may reduce it and this is not a guarantee