That oscillator coil winding was on the outside of the form. There were several spots with the green cancer and it was open in three places. Fortunately, again the "open" spots were all at the beginning and end of the winding and only 2-3 turns were lost in the repair
Was this cancer due to a period of humid storage, mold growth that ate protective coatings, allowing oxidation?
Is there a method to cancer-proof more exposed windings which seem to be at risk? brush and encapsulate with spray lacquer? Or just spray with DeOxit and rely on the remaining lubricant to ward off decay?