I use a mixture of beeswax, olive oil, and Venice terpintine to treat my leather holsters after making them. Venice Terpintine is not what you buy in the paint store. It is a jelly like substance bought in tack stores and farrier supply houses and is used to toughen the soles of horses feet. In that application it must be used very judiciously, as it is very penetrating and highly irritating and can actually lame a horse. The Venice Terpintine penetrates and stiffens, the beeswax adds a soft waterproof sheen and the olive oil simply facilitates application. The mixture is initially very tacky but dries to a beautiful finish with a nice natural feel. Obviously this mixture must be made with the beeswax in a melted condition.