This Stuff Works University
The below pdf's contain literature beneficial to anyone involved in the battle against graffiti vandalism. Some information is product related but the majority deals with the many aspects of graffiti. Once you have downloaded and read the 4 modules you are welcome to take the four quizzes. Click on the link on the bottom right. Upon successful completion of the four quizzes you will receive a Graffiti Abatement Specialist Certificate.