The Aculon treatments result in a functionalized surface that is highly oleophobic. As can be seen from the graph below a treated parts is 8 times more oil repellent than an untreated part where oil would easily wick across the surface.
The skin of the lip forms the border between the exterior skin of the face, and the interior mucous membrane of the inside of the mouth. The lip skin is not hairy and does not have sweat glands. Therefore it does not have the usual protection layer of sweat and body oils which keep the skin smooth, inhibit pathogens, and regulate warmth.
1 These bumps are normal structures like openings of minor salivary gland or oil glands that are found on the upper lips and cheeks. 2  Mucoceles may also be found on the inner side of the lower lip.  Causes. A bump inside your mouth may be caused by burning after drinking or eating something that was too hot.