A surface can be 'protected', making it easier to remove graffiti from it without visible damage. A number of products are available to seal the surface with a protective coating. Council does not endorse any particular product or manufacturer.
The use of protective coatings can:
There are many variables and points for caution in the match of surface material, coating and removal products. It may not be wise to use permanent coatings on sandstone, especially 'heritage' sandstone. Certain solvents may still be able to easily remove some 'permanent' coatings and some solvents may cause more damage than the graffiti. Broadly, there are two types of coating: sacrificial and non-sacrificial (permanent).
The sacrificial coating is one that is removed along with the graffiti when it is cleaned from a surface.
Non-sacrificial coatings are intended to remain in place for a considerable period of time and through repeated removal of graffiti. (It is inevitable that with a number of removal treatments, especially if accompanied by abrasion, the coating will break down and need to be replaced.)
[Information on removal and prevention of graffiti reproduced with the permission of the Western Australian Premier’s Department].