Mad Phil asked me to replace the bulb in a lamp along the walkway to their garage, which turned into a bit of a circus: the bulb had shattered, leaving only the base in the socket. After clearing away the rubble, I was confronted with this:
I removed the entire lamp housing, laid it out on my workbench, and eventually resorted to jamming needle-nose pliers into the base and forcibly unscrewing it. That worked:
Fortunately, the aluminum lamp base had corroded against the brass socket, not the other way around, so buffing the socket with a brass wheel in a Dremel handset and polishing the base contacts brought it back to life.
Reassemble the lamp and it’s all good…