They were the standard open Fender tuner on a ‘55 Fender Custom shop Precision. The bass was somewhat reliced and so those tuners were consistent with that. They were never so easy to turn and were heavy. That is why I replaced them with the Gotoh resolites (recommended by someone here on the post). The resolites immediately cancelled out the neck heavy aspect. So you are saying I should soak them in WD-40? I’m assuming as it eventually loosens up from this, to disassemble the whole tuner and steel bush off the rust and getting into the grooves and then afterwards do the petroleum jelly treatment? Thanks
The WD 40 will probably remove most of the rust with some help from a rough cloth, toothbrush , or extra fine (0000) steel wool if you must. It's not necessary to submerge th tuner, just a heavy application or three that gets into the gears, screw that attaches the post, and where the post contacts the mounting plate, etc.
Candle wax will also work as a lubricant, or Gwyneth Approved extra virgin Fillipo Berio.