Etched Corian vanity units polishing repair Etched Corian vanity units polished to remove stains 1 Stain marks and rings from chemicals 2 Chemical etched Corian 3 Ring mark where the bottle of drain unblocking liquid was standing 4 After the polishing, the Corian is new again 5 New shiny look 6 The ring mark is completely gone 7 Before and after look see more repairs