Makes sense, Uri. After investigating WD40, I find you are essentially finishing the wood with mineral oil that is diluted to be absorbed quickly into the wood. And after the initial application, you maintain the finish with nose and elbow grease (body oils and hard work), and over time you develop a rich patina and feel that money can't buy. I like. WD-40's main ingredients, according to U.S. Material Safety Data Sheet information, are:
50%: Stoddard solvent (i.e., mineral spirits -- somewhat similar to kerosene)
25%: Liquefied petroleum gas (presumably as a propellant; carbon dioxide is now used instead to reduce WD-40's considerable flammability)
15+%: Mineral oil (light lubricating oil)
10-%: Inert ingredients