Nano coatings have excellent anti-graffiti properties due to their unique surface structure and chemical properties. When graffiti substances come into contact with the surface of the nano coating, it is difficult for the graffiti substances to penetrate and adhere due to the low surface energy characteristics of the coating surface. This property makes graffiti easy to remove without damaging the coating or the underlying surface. Compared with traditional anti-graffiti coatings, nano coatings can remove graffiti multiple times without re-coating, greatly improving durability and economy.