What Does 'WD-40' Stand For?

Does the name of the iconic household product WD-40 reveal something about its invention?
The lubricating spray WD-40 is so named because it was the product of the 40th attempt at creating a water displacing substance.

Why WD-40 is named WD-40

File:WD40 english.JPG - Wikimedia Commons

What's Inside WD-40? Know before you spray! – President Trading Online

WD-40 must stand for Wild and Dirty (vintage WD40 sign reproduction) : r/theyknew

Stand with WD-40 - Meme by UrbroCambro :) Memedroid

WD-40 - Wikipedia

WD-40 SPECIALIST 15 oz. Degreaser, Industrial-Strength Fast Acting Formula with Smart Straw 300280 - The Home Depot

What Does WD-40 Stand For, And What's In It?

What does WD-40 stand for? - WD40 India