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"Petrolphobe" is certainly better than "petrophobe", and probably what I meant to type.

The glycerin is ABsorbed by the skin, and disappears into it. You might argue that castor oil is ADsorbed on the surface of the skin (without penetrating), but I think it's a stretch to think of an...

Stefan's formula looks good, although I'd drop the glycerin, as it would seem counter-productive (it's absorbed).

Mineral oil is another possibility, although not liked well on philosophical...