Many players know about the method of using a tip shaper
(such as a Willard) where you work just with the shaft.
Sitting down, roll the shaft back and forth on your legs
while holding the shaper on the tip with the other hand.
Tonight, doing some tip maintenance, it occurred to me to do
the same thing with my Porper tip burnisher (the hollow
plastic cylinder type). You can get so much friction going
that the sidewall of the tip burnishes up really well. It
was actually the shiniest I've seen.
Pointer: Move your hands forward and back TOGETHER so the
tip doesn't pivot in the burnisher.