I'm working on a 1979 Flash pinball that's been in a garage for 25+ years. Dust and grim have infiltrated all parts of the game. What do people recommend for polishing up the lights sockets. Sitting for so long almost all the sockets have a white dust on them. The sockets have what seems to be a paper separator between the contacts and at the bottom inside of the socket. I've tried a tumbler before, but that gets a lot of media in between the contacts and inside. How about an ultra-sonic cleaner with just water? Any other suggestions besides just buy new sockets? You can see in the image, especially the middle, the white dust on the socket. I assume it's just the material the socket was made from reacting with moisture.

lights (resized).jpg

It seems as though, only the lamp sockets with the long mounting bracket are the ones effected with the corrosion. The short mounts or the ones stapled to the playfield don't seem to have a problem. I'll look into order some. Looks like I'll need to do about 45 of them.