Removing graffiti from porous surfaces comprises spraying the surface with a solvent-based gel, allowing the gel to dry and blasting the surface with a substance that acts on the surface in gaseous form

摘要

Method for removing graffiti from porous surfaces comprises spraying the surface with a gel comprising hydrocarbon solvents, a polar solvent and a gelling agent, allowing the gel to dry, blasting the surface with a substance that acts on the surface in gaseous form, and optionally washing the surface.