resizing polishing buff to restore hard BNC plating?

[coppercone2]

So I figured out that for silver plated BNC, the best way is to desolder them, ultrasonic clean for a long time and then give a dip in tarn-x, it makes them look decent again. Not polished but shiny and clean and likely very accepting of oil, and basically there is no mechanical work done on it.

However, for the chrome? BNC connectors, I am at a bit of a loss. I saw a post by Robrenz where he used a chrome polish on a hollowed out buff that goes into the BNC port while attached to a rotary tool to do the inner surface.

Just how the hell do I resize or cut a piece of wool? Are there any other methods for this?

 I found that using a small buff with chrome polish from the hardware store makes the outside of the connectors look good again, but I have no way to do the inside of the tube, especially with a 75 ohm pin and dielectric blocking the middle.

Do you need to cut these things on a lathe? Is there another method? Unlike silver, I don't think that the ultrasonic will touch the kind of corrosion formed on the chromed BNC connectors, so I don't think my silver plated BNC method is an option, plus since its hard chrome (or is it nickel?), when you use the buff it actually gets nice and reflective again, instead of super silver mate color like the cleaned silver BNC connectors (I don't want to mess with abrasives and thin silver plating anyway since it looks good, someone saw it and said 'thats silver', so I know I did a good job ).

I thought to maybe to try to drill the middle out but for some reason I don't see anything working on a wool pad, and even if that did work, how do you resize the outside diameter?

I am only working with signals to like <1MHz, so its not going to be a signals issue. Some of them are really dirty with 'spots' of corrosion, not just discoloration, that do go away with slightly heavy polishing action using the chrome polish, so I think I need to use a tool for this.


This is the best method I have seen

This is the secret to the super clean BNC insides. I mount a very hard felt cylinder in a Dremel tool running at 5000 rpm. In "manual lathe mode" take an exacto knife and bore a hole in the felt that clears the teflon insulator of the BNC. Also turn down the outside diameter of the felt to be a snug fit into the BNC.  This can be a very dangerous thing,  apply all your wood turning skills here. Soft felt won't work, it will fly apart before you get the shape you need.
-robrenz

I want to know, is there a easier way. 


The best method I have so far is to use a Q tip and swirl it around inside up to the dielectric pin, then use a micro expensive q-tip from caig to swirl between the dielectric and the inner body, its very slow and wasteful but I foresee a grievous injury from trying to shape a spinning felt with a exacto blade. Looks like more then a few hours of tedious work to do it by hand but I want something that will not result in injury.