Ripple Whine wrote:

What you really need is the "bearing blaster"

Here is a garage door bearing blaster advertised for $135.

http://www.stardoorparts.com/Garage-...ingblaster.htm

I can see the advantages for the professionals (e.g., you can remove
and replace bearings without removing the bearing end plates); but
for homeowners, it's too costly (IMHO) for such an infrequent task.