Oxalic Acid

* In household chemical products such as Bar Keeper's Friend, some bleaches, and rustproofing treatments. * In wood restorers where the acid dissolves away a layer of dry surface wood to expose fresh material underneath. * As an additive to automotive wheel cleaners. * As a mordant in dyeing processes. * Vaporized oxalic acid, or a 6% solution of oxalic acid in sugar syrup, is used by some beekeepers as an insecticide against the parasitic Varroa mite. * As a rust remover in such applications as automotive shops and for the restoration of antiques. * As a recommended surface pretreatment for stainless steels (surface etch) before application of solid metal or polymer self-lubricating coatings. * For polishing stones and marble. * Used in the acid treatment for destroying warts.[citation needed]