... surface gloss,deep clean,externinate recurrence of rust and yellow stain.3)It applies to rust and stain on any polished-surface and ... floor,wooden floor,furniture,clothes,automobile,cultural relics,etc,;4)Rust and stain which burglar mesh,iron sheet roof,indoor and ... or other buildings in welding with a electric welding machine,rust of hardware lock, mechanical equipment and electric appliances which is ...