Marble etch stain repair and polish in a mansion house This Black & Gold marble window sill surface was stained / etched by a lime scale removal liquid and had to be polished back to restore the shine 1 The stain is visible from the stairs coming down 2 Against the shiny surface the etching is very obvious 3 Close up of the etched stain 4 After the polishing and sealing the marble is as good as new and shiny 5 The marble is shiny and reflective and there is no sign of damage see more repairs