I won't get surly with Mink oil, Rod. Pretty sure what it is. "Alchemy," for me is scientific sounding names used not to inform but lead the listener to give up and assume the speakers is ontop of a complex scientific understanding, so they don't need to. It all erupted for me once when trying to figure out exactly how to renew the DWR of my beloved gortex parka. I read all the technical FAQs I could click up--Pata, WLGore,--going through soap (stearates) and its scum, detergents (do you want ionic surfactants, anionic, or both?), contaminating fragrances. Nikwax is the kind of product that makes me surly. Woo-woo science mystery words--"harsh", "contaminating"-- on top of the fact that they just don't work. (At least to put the DWR back to new). Now I don't try. Wash until intolerable, then buy new. You can't take it with you. I saw something here about treating Alaskas with a product in damp towels. So, a water soluble wax. Can do.
But...here's a guy who feels my pain on curiousity killing scientific "explanations"!
"Funny... If you search on the net, you'll find 2 types of answer:
—«don't do that, hot scrape instead» (based on a very very intelligent syllogism; base cleaner are harsh, will harm your skis...) That' complete bullshit. Bases are made of plastic (Ptex polyethylene) and are inert.
—use commercial base cleaner; «common, don't be cheap, just 20$ for 150ml... it will last forever.» Nope. It won't. If you ski à Noël pis au jour de l'an exclusivement, ciboire, oui, ça va durer. I do not like to be robbed in repackaging/marketing BS."