Yes, best thing for It. Problem is 99.9% of the time it is applied on top of the seats, on the finished, polished and dyed side of the leather which is not terribly effective but good enough.

I'm certainly not advocating the following as it requires special skills, but when we restore antique autos with original leather we take off the seat coverings, which were simply stretched over the seats already assembled. We then have access to the unfinished underside of the leather, which is then sprayed with neatsfoot oil. Then re-stretched over the seats after the cotton and horsehair is replaced, then fastened and trimmed.

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