The following information came from a Yahoo Jabiru group some years ago. Don't know how relevant it is today or to your problem but it may help knowing some history.
Jaba Chat newsletter August 2001 first mentioned the epoxy and cotton flock
attachment of distributor rotors:
"Because of backlashing of gears, vibrations reflect back to the rotor causing a
slow wear of the rotor shaft and spring to distributor shaft. Inspection of
these is a must at least every 50 hours. Believe it or not, some 5 minute epoxy
araldite and flock applied to the inside of the rotor when assembled to the
distributor shaft will cause it to remain rock hard forever. To remove,
carefully pry off. A rotor which is moving inside supplying spark to the plugs
is not a good idea."
I suspect it has been mentioned since then too, but the info had not altered
it's basic idea.
"Cotton flock" is a fibre material, not a powder. Any good fiberglassing supply
should have some, but you probably have to buy a bag of it, which would last
456,765 rotors. But it should be inexpensive. It's used for all manner of
fiberglassing jobs - making strong fillets, joining parts in molds and so on.
Perhaps check the West System catalogue for it. I got mine (not West) 15+ years
ago, and still have the same bag of it.
