For lighter areas/surface grease The Liquid Leather Degreaser will remove the grease incredibly quickly, without the need for any additional products or procedures. Just use an absorbent cloth to apply the product to the affected area and watch the grease disappear. For heavily greased areas If the Leather is heavily contaminated with grease then you should use the Leather Degreaser (gel degreaser) as well, to help draw out the grease from deep within the leather.