WD-40 has a wide range of legitimate uses, including lubrication, degreasing, and rust penetration. There's even a whole world of hidden uses for WD-40 that encompasses everything from breaking in baseball gloves to removing duct tape residue. There are so many practical uses of WD-40 that you'll never run out of reasons to keep a bottle (or two) of WD-40 handy. As useful as it is, though, there are some situations where using it might be a mistake.
As far as aerosol sprays go, WD-40 might be one of the most popular ones ever. The famed Multi-Use Product is something of a household name that had lofty origins in the aerospace industry before making its way to ubiquity and a place on the shelves of almost any garage or workshop across the globe.
