It is used when it is planned to apply paintwork or putty on the working surface. When brickwork is new, then in this way it will be possible to remove the pantry, which is present on the surface of the wall. The old masonry is easier to clean from all kinds of pollution and finishing materials. It can be dust, soot, crumbling stucco, dirty tacks and fungi. In this way they use to remove graffiti.
