http://www.pbresource.com/tools.html

It's # STI - a fine abrasive impregnated into a fairly hard rubber stick. Works great. I am not a fan of using anything with a brush on sockets. Always that chance of a single wire coming off & creating a difficult to find short.

They might work when they are black like that, but run extra hot. Always replace these to avoid melting plastics.

Unless you give that a coating of clear or maybe wax it heavily, it's going to rust in the future. The plating is mostly gone now.

I like to use Brasso on the bakelite plate & polish it, then clean off with 91% alcohol & finish up with a VERY-VERY light coat of Teflon gel lube.

I bet if you gave those old legs a bath in evaporust overnight they would look fine.

True that. Save the old ones though, you never know when you might need them for another project.

seattle.craigslist.org link

Very nice. Perfection takes time.

To each their own, but to me LED's blow in an EM. Just don't look right.