Before beginning to remove any graffiti, you need to first identify what kind of material has been marked by the graffiti. Stone, brick, concrete, glass, aluminum, street signs, and bus stops are just a few of the materials and places where you can find graffiti.
These surfaces can be smooth or textured. Some are painted, while others are not. All of these factors are important to be taken into account before you can decide what process to use to remove the graffiti. Most graffiti is applied using spray paint, but some artists use markers, stickers, or other means in order to mark their material. Each material and graffiti process requires a certain means of removal, which varies depending on the combination of both factors.
Except for paint, graffiti removal materials cannot be found in hardware stores or other shops. They must be ordered from specialty suppliers and often are only sold in bulk to cities and professional graffiti-removal services. However, if the graffiti that needs to be removed is paint, you can find these supplies at local retail stores; however they are likely to be specific for small projects. One method of removing graffiti is by painting over it.