Just exactly what is WD-40?
Many of us use it for all sorts of things. Supposedly, the actual ingredients are a closely guarded secret. But I'm sceptical of the ability of humans to keep anything very secret for very long.
I just read a claim that the basic ingredient is fish oil.
Previously, I had heard kerosene.
One guy I know is adamant that the stuff is a solvent but not a lubricant.
Any other guesses?