Those high grits do polish an edge to a mirror, not mirror like, mirror.

After the 12000, without stropping, my razors pass a hanging hair test with easy. That is, you can hold a hair and brush it across the edge and it splits. There are videos of hanging hair test if you are wondering what a sharp edge really does.

I have a clean strop for preshave and a loaded strop for weekly maintenance. I have a light powdering of chromium oxide 0.01 micron jewelers polishing powder on the loaded one. That is equal to 200,000 grit.