4NRadio addresses my post about the oxidization on my Panny RF-877:
DeoxIT is not the best product for potentiometers; you need Caig's FaderLube product for all carbon pots. If the wiper contact is metal the best product is DeoxIT D100S-2, but if you don't know the pot's construction then FaderLube is a safe choice. Save the regular DeoxIT for known metal-to-metal situations (connectors, jacks, etc.)
I've never seen any radio that gives access to the volume pot's internals after simply removing the knob. Unfortunately you have to open the case and sometimes remove a good amount of boards, hardware, and circuitry just to reach the pot's body. Even then, you may be faced with a type of control that has no access hole or openings in which to spray FaderLube.
If you're lucky, the thin plastic tube that comes with FaderLube in the spray can formulation will be able to reach a crack, opening, or hole in the sheet metal casing of the pot. Then you can spray a minimal amount through the opening and work the volume knob back and forth, hopefully cleaning & lubricating the control. In rare instances I have made a small hole with an awl or punch in the sheet metal body of the pot to make an access hole towards the "front" of the control (better chance of the spray reaching the carbon surfaces). I don't like drilling holes because a single metal chip can cause major damage on the pot's carbon traces.
In an ideal world you would replace the worn pot with a brand new one of equal value and appropriate size.
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