[Joeztech]

If there is only some light surface discoloration on the tube pins it may be possible to remove that level of tarnish with a pink pearl eraser. They have a very fine abrasive in them which is kinder to metal surfaces than sandpaper or a nail file. Deoxit it an excellent cleaning chemical for tube sockets. It can be used on the tube pins also. I used to use a typewriter eraser on more stubborn surfaces years ago, but since there are precious few typewriters still in use those would be hard to come by now.

Joe