Itinerant Air-Cooled

Should a bit of grease be used where the crank mates to the flywheel, or should it be installed dry?
The rubber ring seal has been replaced and the groove cleaned, but thought I should ask this silly question too.
Gracias!

i have always put a very light coating of moly on it.

Thanks. It sure couldn't hurt. I wanted to ask anyway for posterity.
I wonder how much longer this knowledge will be useful?