Retail space owners and landlord's often inherit wall art  and graffiti on interior walls that are unwanted;
            This video will teach how to repair Graffiti and other  unwanted images and art currently installed on interior walls. For the purposes  of this video we will assume the walls are modern GWB (Gypsum Wall Board). Here  are examples of wall images you may want to remove:
            1. Graffiti by spray can; both the type installed by vandals  or the artistic version commissioned by owners. 
            2. Faux finishes and Trompe-l'œil installed by artisans.
            3. Adhesive decals and stickers.
            Surface preparation
            If the imagery is an applied media such as vinyl decals or  stickers it will need to be removed by sanding and scraping.  This process may damage the wall board. The damaged  areas will need to be repaired with wall joint compound or spackle and then  primed.
            If the imagery has a buildup or texture, which is common  with faux finish stippling, it will need to be scraped and sanded to a more  consistently and even surface. Surface texture will affect how a wall looks  even after it is painted.
            If the image is charcoal or pencil lead it will need to be lightly  scrubbed to remove the majority of the loose particulate.
            Priming
            After the wall prep work is completed the walls should be  primed with an interior grade stain blocking primer. Oil based primers are more  effective blocking stain and dark images than water base primers. The primer  should be allowed to completely dry. Often the image will need to be primed  twice if the wall will be painted in white or other light colors.
            Painting
            Once the primer has adequately dried the walls can be  painted straight away as if it were any other wall.