You can also buy a lifetime supply of graphite by buying a one-pound
can of seed lubricant for about $15.  It is used to lubricate seeds in
automatic seed planting machines.  Any farm supply firm will have it.
I have used about 0.1 percent of my can in the last 10 years.

Best regards, Spencer Chase
Garberville, Calif.
http://www.spencerserolls.com/