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Reply to "3n1 oil and Lionel lubrication"

Originally Posted by gunrunnerjohn:

... After a year or two, it turns into some sort of sludge-like varnish that is almost impossible to remove!  I've had to soak guns for a week in solvent to loosen the WD-40 before I could even disassemble them! 

IMO, it fails miserably as a lubricant.

I wonder if the WD-40 may have partially dissolved other old oils or cosmoline which redistributed and re-solidified in different places after the WD-40 dried out? I haven't experienced WD-40 itself turning into a "sludge-like varnish". Just interested.

 

I consider WD-40 to be a penetrant and "temporary" lubricant, as for removing rusty bolts.

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