Human/animal perspiration and hair contains an oily grease which destroys leather finishes, so if recolouring an area which has been damaged by this, you must try to remove as much as possible, otherwise the dye will come off. GT20 Hair & Hand Grease Remover is a strong smelling solvent that removes the damaging perspiration and hair oils/greases that we all emit, whilst not removing any remaining colour from sealed leathers unless the damage is very old, then the colour has often gone anyway. Apply GT20 Hair & Hand Grease Remover liberally to the affected area and leave it until it dries to a powder, drawing out the grease. Then brush or vacuum the powder off.
This product has a very strong odour, so must only be used in well ventilated areas.
DO NOT USE ON SUEDE OR ANILINE LEATHER