For about 2 weeks I used Ballistol in a 1:9 mix on a natural coticule. No noticeable difference, to me; except for honing "feel".

I weighed, and then soaked, the coti in 1:4 mix of Ballistol : water. After a 3 day soak I weighed the coti again; weight was virtually identical to pre-soak weight. I assume that there was very little absorption. The oil rinsed off easily, no surprise since Ballistol emulsifies with water. Since I sold the coticule, not repeatable by me.