P28R control yoke refurbishment or replacement

I sent my yokes to Advance Paint Tech in Cleveland (they advertise in Trade A Plane) to be powder coated. After reinstalling them in the plane the coating came off. Sent them back to be redone. Again the coating came off. Then we had a local powder coating shop do the work with excellent results. (Why didn’t we use the local guys from the beginning?) They said Advance Paint did not remove the old material. So now the yokes look better than new. However! While this was going on I had some avionics work completed. The local FSDO decided to look at the paper work for my avionics installation as part of their annual FAA Repair Station inspection and saw the logbook entry for the yoke powder coating. Turns out, according to our FSDO you can’t powder coat yokes even though they come from the factory that way. So big fine to the avionics shop and letter to my mechanic. We had a DEQ authorize yoke powder coating for my PA-28R 201T so after lots of FAA fun we’re legal.