I agree with this. I rarely use Renovateur on my shell shoes. It seems like the neutral Saphir cordovan creme does a good job moisturizing the shell.
Regarding the deer bone, I have one but rarely use it. You can see it adding fat/oil when using it, but I tend to find that brushing and occasional cordovan creme gets the job done by itself.
Good to know thanks. I was going to use the deer bone mostly for smoothing out some imperfections on my daltons since they were seconds. I'll post before and after if it works..or doesn't :)