Reading the thread 'Wax as rust protector' got me wondering whatever happened to cosmolene? It was THE thing during WW2 and afterward for protecting weapons, aircraft parts etc for shipment and for long term storage. I tried looking for it on the web and the closest thing I found was a concoction made up by gun enthusiasts to replace it because you apparently can't buy it anymore.Amsol sells a Heavy Duty Metal Protector it advertises as being a modern replacement.
But I can remember a form of cosmolene in which parts to be put in long term storage were dipped in a molten bath of stuff that formed a1/2 inch thick plastic-like coating over them. It was about the color and appearance of beeswax but not as soft. The stuff had a waxy, oily feel to it and you could cut it open with a knife and peel it cleanly off without having to wash the part in a solvent afterward. But maybe that was only immediately after it had been put on? Did it tend to dry out into something less easy to get off over time?