Going back to the original topic, I think it was related to the use of
WD-40 as a rusty nut penetrating oil.
My can clearly states the following:
Lubricates moving parts.....
Cleans....
Protects against rust.....
Penetratesto free stuck parts.....
Displaces moisture......
I find that most of this is advertising. It does poorly as a penetrant
and poorly as a lubricant. There are many products that do an average
job at these functions and they are hands down better than WD-40.
But... It is excellant as a cleaner. I use it to remove grease, oil and
adhesive. I use it when I clean bearings. After the obligatory cleansing
in solvent, I spray some on the bearings and spin using my compressor's
air gun.
Also it is very good at water displacement. As a matter of fact, That is
what it was designed to do. It took many trys at the formula but htey
finally got it. Hence the name WD-40. It was the 40th attempt at making
a water displacement product (WD).
If it is a rusty nut you want loose. Try some other snake oil product.
You couldn't do worse.
Of course this is just my opinion. I may be wrong.
Chuck Schaefer
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