First, I thought Chromium Oxide was 50,000 grit not 30,000.
Second Chromium Oxide has not had a bum rap recently. Everybody agrees that the Chromium Oxide will smooth an edge as well as you could wish.
But it is not the same as a natural hone and it has the disadvantage of reducing the life of the edge.
You can also put the powder or the paste on leather or newspaper. You will get the same result honing a razor as a final polish on these mediums.
The one thing that surprises me looking at the photographs is how clean the hones are. Even using a very light stroke, I have always found that Chromium Oxide takes away a lot of metal and it leaves the hone that tell tale grey colour.