I have this old set of casters I'm trying to save. Steel everything, quite
rusted. They still turn but sound like a sack of cats. These don't disassemble
and the replacement ones have plastic wheels. Yuck. So I'm trying to get the
rust off. These are stem casters, 7/16"x1-9/16" stem, 2" wheels. Yesterday I
suspended one by the stem into an electrolytic derusting solution and gave it
a whirl. The caster housing derusted beautifully but there is apparently too
little electrical contact with the wheel to have any effect.

How can I EDR the wheel? I thought of soft-soldering a wire to the rim of
the wheel and suspending it by the wire (with just the top of the wheel
out of the solution). Is there any better way?

GWE -- rookie EDR'er