A local authority approached us looking for a solution to remove graffiti from sandstone blocks on a bridge underpass. In this case solvent based aersol paint had been used to graffiti the block work and due of the porous nature of the sandstone the paint becomes extremely difficult to remove.
The client required a cleaning solution that would effectively remove the graffiti without damaging the sandstone.
The entire bridge underpass was abrasive wet blast cleaned using a specialist abrasive for delicate stone work. This not only successfully removed the graffiti but also cleaned the stone leaving it looking like new.
Three coats of an Anti-Graffiti Polyurethane coating system was then applied to seal the stonework.