For the removal of superficial rust stains produced by ferrous substances or objects (fertilizers, tools, iron parts etc.) on natural and artificial stone or concrete ashlar being sensitive to solvents. Ideal for marble or lime stone surfaces already laid or ready to be laid. Can be applied punctually on stone surfaces because no changes appear. Additional Details ------------------------------ Product description: For the removal of superficial rust stains produced by ferrous substances or objects (fertilizers, tools, iron parts etc.) on natural and artificial stone or concrete ashlar being sensitive to solvents. Ideal for marble or lime stone surfaces already laid or ready to be laid. Can be applied punctually on stone surfaces because no changes appear.