Just for the record, 50 microns is HUGE compared to anything we would ever use for honing.

I belive that would be roughly the equivalant of a 300 grit hone. Not sure you'll be able to accomplish anything useful with it on a razor.

On the other hand, if you've got some trash blade lying around, give it a go and see what happens. Worst case scenario, they're still trash blades when you're done.