Randy,
I was wondering about rottenstone and pumice too. I used them quite a bit for polishing out varnish finishes on woodworking projects.

Might have to make up a strop for that too.

I am finally feeling satisfaction now that I gave up on the stones and went with all pasted strops. Just "brought back" another old razor that was close but not quite there by starting on a 1 micron strop and progressing to finer and finer pastes. It gave me a a great shave this morning.

Tony