"Stainless" steel, is it not? Mine certainly is.
Stropping on a piece of cardboard at the first sign of loss of sharpness seems to delay the need for serious sharpening.
I use a light dose of mineral oil on mine since it [Ed.: the knife] is used on food regularly.
WD40 is a moisture displacing product, rather than a lubricant, and is not recommended as a sauce.
As the stainless is quite resistant to corrosion, most probably settle on keeping the blade clean and dry after use.
Besides food prep, I have used mine for the entire list of bushcrafty tasks.