[ Jean Blondeau wrote in 050104 MMDigest:

> I have several 15.5" Regina music box discs that have
> rust on them.  Does anyone know the best way to clean
> them and make them usable again?

Dear Jean,  I have de-rusted a lot of discs by following
the method given by Bill Dickerson.  You can find it on
http://anytique-engines.com/electrol.asp 

Be careful to write down the title before starting the process,
for this also disappears as does the rust.

Good luck
Herman Lokenberg