The case FOR WD-40 use in typewriters by [[Thom Cholowski]] in Antique Typewriter Maintenance Group

Some thorough colloquial and unreferenced, but reasonably scientific advice about the use of WD-40 to clean typewriters, particularly with respect to water displacement.

Once used for cleaning typewriter internals, WD-40 needs to be flushed out with kerosene or naphtha.