Thank you @ScottWolf for wonderful explanations. I have a bike saddle , Ideale90 which was neglected and now try to restore it. I have buy some ingreadients - beeswax, cocoa & shea butter, almond, coconut &avocado oils, lanolin & now need to run to find some beef suet to make some tallow . Will keep all updated! I am thinking to make 2 batches of balm, 1 with tallow and 1 without cause i am affraid not to soften too much that pcs of leather. What do you think? For cleaning, recomandation was to clean it with some mild glycerine soap. That saddle is like 60 years old and i hope it will give some good rides and not only keeping as a museeum piece. Cheers!