I use a piece of absorbent foam, actually not for the advance spring mech (I spray chain wax in there for that)
The idea is to keep the heels of points lubricated without getting oil or grease on faces themselves.
Anything that holds some oil should work fine, centrifugal force gets it out, Steve's dremel pad sounds easy to get, thin oil is good.
Annual attention, clean fuel tap filters while tank is off, world is good