With the proper care, your furniture will last a lifetime, and improve as time goes on.
Some finishes of leather may or may not be suitable for ths type of stain removal. Always perform a spot test in a hidden area and allow the area to dry completely before overall use. Specially formulated products can be used to rejuvenate fine leather surfaces, however, some leathers are more sensitive than others so always spot test before use.
These types of leather have no protective film covering, making them more susceptible to stains. Some suede and nubuck coverings are treating with a waterproofing stain resistant solution.
Suede and nubuck can be cleaned effectively with a vacuum cleaner and a soft nylon brush.
Butter, oil or grease stains should not be washed. Water will push the stain in deeper or smear it, creating a bigger mess.