...After playing with this some more, I think I've got something nice...
I worked the nib on the stone as if I was writing with it, but in a small circle area half the diameter of a dime. Pretending to write, I could feel rough spots catch on the stone, probably because 4000 grit is a take-down grit. I'll have to look for a 10,000 or 15,000 cloth to finish it off, but it feels very very nice as it is!
And as a bonus, Amodex took all the ink off the stone!
Here is a video of what I did:
Edited by quickdraw, 11 January 2013 - 18:10.