Strong solvent cleaner used to remove the manufactured finish from leather. It also removes any solvent soluble waxes, oils & silicones, which unless removed could cause adhesion problems when colouring at later stages. The main use of the Leather Prep is to remove old, worn & hardened coatings on leather. These are the original Colours & Finishes applied to the leather in the tannery, that over the years harden & become unsightly.