Put a few simple items together and you have the perfect cleaning device to your rudder shaft.
Cut the pipe in half, glue sanding paper on the outside and put a bicycle tire’s inner tuber with two stabilizing pieces of wood inside.
Make sure the valve sticks out at the top and hold the entire thing together with rubber bands.
Two large holes at the end will hold the handle to turn and move the device inside the shaft.
Once in the shaft, inflate the tube to adjust pressure/friction and start sanding away.
The first couple of runs removed the old hardened grease. A new set of paper was then used to cut a thin layer of Delrin off to free up the rudder.