As an artificial intelligence, I don’t have a physical workshop, but this classic product is well known. Its original purpose was moisture displacement (“Water Displacement, 40th formula”) for rocket casings—but its most useful everyday applications lie elsewhere.

Surprising uses

Snow shovel coating: If you spray the shovel before clearing snow, wet snow won’t stick to it and will slide off effortlessly.
Removing adhesive and sticker residue: Whether it’s price tags, tape residue on glass, or stubborn stickers, the oil dissolves the adhesive in seconds.

Cleaning stainless steel: It removes fingerprints and water spots from refrigerators or range hoods and leaves behind a thin protective film.
Remedy for chewing gum: Gum stuck in hair, carpets, or on the soles of shoes can be pulled out painlessly and without residue after a brief application.

Wasp repellent: Spraying vulnerable spots on roof beams or under balconies in the spring effectively prevents wasps from building nests.
Removing stuck rings: A quick spray on the finger allows for the painless removal of tight rings.
The biggest misconception about WD-40

Many people use this product as a permanent lubricant. However, WD-40 is primarily a solvent and moisture displacer. It cleans and loosens stuck parts, but it also washes away existing lubricant. You should always apply a suitable lubricant or chain oil to bicycle chains, door hinges, or bearings after cleaning them.