Product Short Description: Oxalic acid works with rust on rusty metal to get dissolved chemically. Oxalic Acid work with ink to get dissolve. It can be used in laundry facilities as an acid rinse that helps to get of rust and ink stains. The oxalic acid chemically reacts with the rust and ink makes it much easier to wash the Product Description: Oxalic acid is safe to use around the home, as long as you take the correct safety precautions. Rust stains on porous surfaces such as carpets and clothing can be removed by using oxalic products. Applying the chemical to the effected area and blotting the excess will make the carpet look as good as new. Beware - do not use normal household bleach to remove rust stains - it will make it worse! Oxalic acid can be used to remove blood, ink and urine stains from carpets. Oxalic acid can also be found in various household cleaning products such as Barkeeper's friend, a popular wood product from the United States. If you love to restore old furnuiture as a hobby or have some old wooden pieces that need a lift, use oxalic acid to freshen and lighten the wood after it has been stripped back. The woodworking and joinery trade make extensive use of oxalic acid. Crystals of oxalic acid rubbed onto wooden beams and floors removes unsightly stains caused by age, exterior exposure or rust easily. It is not only wood that oxalic acid works wonders on. It can also be used to treat, polish and repair other materials such as stone, marble and stainless steel.