In no position to do any testing and create a report,would love to see expert opinions tho.
I will say that people who have used oil have reported great results using mineral oil (which happens to be partly water soluble) or glycerin which is 100% water soluble,some have said that cotis do not even absorb water let alone oil.
Just my two cents,pls feel free to delete my post as it in no way addresess the orig question,just some ruminations on my part.