| abstract |
A coated substrate comprises a removable intermediate coating in the middle of the substrate and a water entrained coating permeable to the bleaching agent adhered to the intermediate coating, wherein the dry coating is less removable and of greater resistance to use than the dry internal coating. When the coating eventually becomes worn and needs to be renewed, a bleaching agent (for example, chemical bleaching agent) can be applied to the coating. The bleaching agent penetrates the coating and attacks the internal coating, thereby allowing the removal of the internal coating and coating without aggressive removal techniques such as sanding. |