>>The widow asked me what could be done to renew the excluders.
 >>

Since many beekeepers also retain equipment as long as they can
maintain and keep it going, this site may be of interest to some
on this list.

http://www.oldwwmachines.com/FAQ/Restoration.asp
     Now go to this page:

http://www.oldwwmachines.com/FAQ/Default.asp

scroll to the very bottom and you will find:
"Cleaning badly rusted metal does not have to be hard work.
Since red rust (ferrous oxide) formation is an electrochemical
process (oxidation), all we need to do is reverse this process.
  During oxidation, . . . "
You can read the rest of it there.


Leland Hubbell