... ,no harm to human body and animals and plants,deep removing rust and stubborn stain.2)No damage to surface gloss,deep ... ,tile,polished tile,cement floor,wooden floor,furniture,clothes,automobile,cultural relics,etc,;4)Rust and stain which burglar mesh,iron sheet ... in stores and hotels are placed for some time,rust stain on clothes,leather and bed sheet in case of contacting iron ...