Michael Koblic wrote:
....
FWIW I tried to make a 3/4" shaft turn more smoothly in bronze bearings. Not
having anything "lapping-like" to hand I mixed up Fast Orange with oil and
used that. It contains pumice and GOK what the grit of that is. ...

Uh oh ... that wasn't a good idea. The pumice will embed itself in the
bronze and continue to lap the shaft, even when you think that you have
cleaned it out. Or, maybe pumice is soft enough that it will break down
- I dunno.

Bob