If there is obvious crack on the wall, gridding cloth should be pasted on the wall and the crack should be bonded.
According to the processing, please check whether greasy layer has water resistance or powder removal. The cement mortar layer should be processed with adhesion agent which is used for solidifying. Then thick leveling materials are used for guarantying the stability of architectural surface durability by selecting wallpaper, latex paint and diatom ooze.
