wrote:


WD-40 does not completely evaporate over time unless the temperature
is higher than that which is compatible with human life. It leaves a
kind of hard residue, almost like a very hard wax. A very thin
coating. Which, unless baked on, will be easily dissloved when next
doused with WD-40. I have had direct experience with this coating.


** Ever burn some oil in a fry pan ?

If you put WD-40 on parts that get hot, a similar residue forms.

It cleans off easily or dissolves in fresh WD-40 so is not a problem.

I see it on the pins of certain noval tubes from time to time.



..... Phil