I was wondering how you can clean old #44 or #47 lamp sockets from early Solid state playfield. Replacing these numerous lamp sockets can be a very expensive proposition with sockets price going up to $2 each or more and I was wondering if anybody had experimented with some technique to restore them to good electrical contacts.
I was thinking about three solutions:
1) Tumbling them with corn or nuts, but that will entail a very deep and thorough cleaning afterwards, as the corn will remain stuck inside the socket. I also suspect that not much rubbing will occur inside.
2) A bath in Evapo-rust.
3) A tedious sanding inside and outside of each socket with abrasive stick and sanding paper.
Any idea and recipe would be more than welcome.