Select your dye from one of the dyed leather samples provided by the shop, because most dye will appear different on your leather than it does in the bottle. Alternatively, look for dyed leather pieces and find one that looks like your leather, then ask for the dye used on that particular fabric to ensure you get a dye whose shade is similar to your leather.
Pour a leather deglazer on a damp cloth and wipe out any dirt or protective finishes on the leather by rubbing the cloth over the leather surface.
Prepare the leather for dying by dampening the surface with a moistened sponge or water spray.
Shake the white dye thoroughly, to loosen any settled pigment and apply the dye on the stain with a sponge brush.
Run even strokes on the stained patch; applying coats until you achieve a shade similar to the rest of the leather. You may require several coats to achieve the white shade you desire. Leave each coat to dry for approximately an hour before applying the next coat. Flex the leather in between the drying period to avoid fiber stiffening.
Buff the dyed area with a soft cloth to remove any excess dye; then polish the entire piece by buffing it with the soft cloth for a polished finish. Coat the dyed area, by spraying the finishing spray on the leather.