Ladies ceramic straightening tongs, SWMBO has two sets of these, and I got to thinking that maybe the ceramic plates in them might be usable as finishing hones, unfortunately I can't investigate this as both her sets are uber expensive and are guarded with a ferocity that borders on manic.

Has anyone out there considered this? I have had a close look and the plates as far as I can tell seem very hard and glassy, although a tad on the small size (about 4" x 1 1/4" ) but would be handy little touch up stones.