If you want them looking brand new & shiny & they have a ton of
oxidization/grime, the only way is to polish them. Usually dental polish tools are a good way. Or wet sanding with very very fine grit sandpaper.
Cleaning tube pins
Anyone have any suggestions for cleaning gold plated tube pins on NOS tubes. I have heard that Caig's is not the answer. Plus, I do not want to take the chance of removing the gold plating.