An anti-graffiti coating is a coating that prevents graffiti paint from sticking to surfaces. Cleaning graffiti off buildings costs millions of pounds annually. Many cities have started anti-graffiti programs but vandalism is still a problem. The coatings developed can be the paint itself, or a clear coat added on top of existing paint or building facades. Depending on the substrate and the severity of graffiti, different coatings give different benefits and disadvantages.There are two common types of paint used today. The first is water-based paints such as latex and acrylic paint, and the second is oil-based paints. The paint of choice will depend on the substrate to be painted upon and the desired end result. All paints have the same basic structure.