CentralCoaster wrote:
I see WD40 as a sort of one-size fits all penetrant/cleaner/lubricant.

It does everything, but nothing well.

Use pb blaster or aerokroil for penetrating fluid, brakleen for cleaning, and the correct grease or silicon lube for lube.

WD is good on something that a harsher solvent might cause damage to. I agree though, it will cause more harm than good if used as a permanent solution.