Was wondering if anyone has tried the “kerosene and baking soda” suggestion in the manual to service this valve? Mine is worn ( the hole shows sign of exhaust leak) but working and I’d like to keep it from seizing. I take it a slurry was made from these two and shot onto the valve shaft?
Also have seen a suggestion to use graphite. I have Loc-Ease with graphite that might be an answer.
Just looking for what others may have done to service the valve.

This is a ‘47 3100 AD 216 I’m looking at.