... surface granite,marble,tile,polished tile,cement floor,wooden floor,furniture,clothes,automobile,cultural relics,etc,;4 ... washed by rain leave in the external wall of buildings,mottling of rust and stain ... unsuccessful start,iron spot deep into stones,tiles,cement floor when flowerpot,metal drum,iron nail,wooden ... of iron stand on tiles,marble or cement ground and wooden floor when shelves in stores ...