Obenauf's and Sno-Seal will darken the leather, but will lighten over time. The treatment is called "dubbin". Both products are far superior to Mink oil and work with pretty much all leathers. Please research Crane's posts on the Wolverine 1000 Mile thread. Sno-Seal, Montana Pitch Blend and Obenauf's have anti-bacterial properties, which is key to hide health. The key is the beeswax.