Your problem belongs to coating stripping. At present, there are roughly three methods: \x0d\ 1. Deplasticizing with organic solvent. There are special organic plastic strippers on the market. Soak the workpiece in the adhesive remover at room temperature, take it out after a certain period of time, manually peel off the paint film on the surface, rinse it with water, then pretreat it and coat it again. \x0d\2。 Deplasticizing with concentrated sulfuric acid. Soak the workpiece in concentrated sulfuric acid at 50-60℃, take it out after a certain period of time, clean it, pretreat it and paint it. \x0d\3。 Deplasticizing with concentrated alkali. Soak the workpiece in 50-60 degrees 45-50% sodium hydroxide, take it out after a certain period of time, clean it, pretreat it again and paint it. \x0d\ As for manual or mechanical polishing, local treatment is fine, but if it is a whole workpiece or a large area workpiece, it is not feasible in industry.