Clyde, I have never claimed to be a leather worker or expert. That said, my instructable on softening leather does work. I have been using this on my own personal leather goods for about a decade, and I got the information from someone who has been using peanut oil on leather for 30 years. We both use it on expensive items, like good quality shoes and saddles. I state in the instructable that it will darken certain lighter and less finished leathers, indeed, I use it for that purpose frequently. In my experience saddle soap cleans but does not soften leather, and often leaves it with a sticky residue. I do not recommend any oil besides peanut oil. I am happy for our audience to make their own choices, after reading all these comments.
There is no real limit to the number of coats, I often apply a fresh coat in lieu of polishing, or before going out on a rainy day. You may need to work the leather a bit with your hands to get softer, if it was super stiff to start with. Not sure what you mean by absorbed into the inside of shoe, it should certainly saturate the leather, not just sit on the top of it. I will often "paint" the inside with the oil as well to speed the process, and maybe wear the shoes around the house a while to work the oil through.
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