Lloyd E. Sponenburgh wrote:
Ecnerwal fired this
volley in
:

There may also be a chemical approach.

there is. Searching my own archives, but it was posted here.

Something akin to "Boiling out broken taps".

Go wayback.

LLoyd

ISTR something about using alum as a means to dissolve steel without
affecting aluminum . Of course I may be wrong , and it would be neither the
first nor the last time .
--
Snag
Learning keeps
you young !