What is the difference between long life and sacrificial anti graffiti coatings?

A long life anti graffiti coating provides graffiti protection for a ten year period. It leaves the wall with a full gloss look and enables graffiti to be removed from it hundreds of times. These coatings offer the best solution in areas of frequent attack (ie monthly). Sacrificial anti graffiti coatings are cheaper and safer to apply and are almost unnoticeable on the substrate, however they only work once. Once you remove graffiti from them, you need to reapply the coating over the effected section. These coatings are designed to protect a substrate in case of an occasional attack (ie. six monthly).