Suede calf is made from a full grain aniline calf leather that was sanded/ abraded on the underside of the skin. Suede leathers are known for their softness and delicate touch.
Due to its textured nature and open pores, suede may become dirty and quickly absorb liquids. Stains, scratches and patina belong to the normal ageing process of your item. Differences in tone, shading, gradation, and the possible alterations of the material are to be regarded as a sign of quality.
Most stains and dirts can be removed by using a special brush for leather. The use of a waterproofing spray is not necessarily recommended. It depends on how you want your item to age.