Full grain leather is known as all non-stamped smooth leather types originating from the top layers of the skin e.g. Aniline, Box calf, Bookbinder Calf, Antique Calf, Boot Calf and Russian leather (Cordovan Shoes and Suede Shoes have their own set of maintenance instructions).
The following suggestions also concern stamped leather (e.g. Scotch Grain, Togo Grain), even though they are not considered to be full grain leather.
The upper leather should be treated with shoe paste at least once a month. This lends itself not only to the shine but also to durability and smoothness of the leather.
A horsehair brush or a cleaning cloth can be used to give your shoe a good polish. When the leather is too dry, marks can appear on the surface after applying shoe paste. To avoid this it is recommended to lightly moisten the leather before applying the shoe paste. Apply sparingly and distribute it immediately over the entire area before the paste is absorbed into the leather.
Excessive amounts of shoe paste can cause the leather to become crusted and therefore prevent it from breathing.