Abstract: A method of polishing a glass sheet which includes the steps of supporting the glass sheet in a substantially horizontal position with one of its major faces uppermost, providing a substantially horizontal gantry (11) supported so that it can be traversed across the exposed upper surface of the glass sheet, providing a plurality of diamond edged grinding wheels (13, 14, 15) supported on the gantry (11) each arranged for rotation about an axis which is substantially parallel to that of the or each other grinding wheel and with the locus of its grinding face arranged to lie substantially in a common plane with the corresponding locus of the or each other grinding wheel, setting the heights of said grinding wheels such that said common plane coincides substantially with or lies marginally below the exposed upper surface of the glass sheet, and moving the gantry (11) relative to the glass sheet so as to cause the grinding wheels to traverse the glass sheet and remove a layer of glass therefrom.