I love Parkerizing things. It is Manganese Phosphate in a weak acid that is electro-charged. Parkerized metal finish will hold any kind of oil that you put on it; the oil absorbs into the finish itself. If/when you get something parkerized, apply a couple coats of oil into it. If you are using the knife for food or game processing, use a mineral oil or food grade cutlery oil as most oils contain Petroleum Distillates that are toxic if ingested. (such as Rem-Oil, and Hoppes weathergaurd ~ both of which I use)
I like parkerization over all other finishes. Parkerized knives braved adverse humid, and wet tropic conditions in WWII and are still going strong today. That speaks volumes about the finishes' corrosion resisting properties. Parkerization is actually oxidation itself; the stable black oxides, not the active red oxides. I have a Mark II just like the one you just ordered. It is a great knife. It is designed great, ergonomic and well balanced in the hand, and the finish on the knife is pretty tough already. Parkerizing the knife would be amazing, but the finish that the knife came with is durable and should serve you just fine. I left mine alone. I'd just tie some 550 into the sheath. :thumbup: