Abstract: Multilayer film comprising a surface layer and at least one other layer under the said surface layer, each of the said surface layers and of the other layers comprising at least one organic polymer and being free of complexing agents, chelating agents and, optionally, mineral fillers, and the said surface layer also comprising at least one agent capable of promoting the removal of the said surface layer by a rinsing liquid. Process for preparing this film. Surface layered with this film and substrate comprising this surface. Process for protecting a surface against contaminants or pollutants using the said film and process for cleaning or decontaminating a surface similarly using the said film. The invention applies in particular to the protection of surfaces such as walls, facades and road signs against graffiti.