I do not have a 9000 but do have a few vintage Kanayama and strop daily on two sets, regularly strop on linen, suede, then leather especially with freshly honed razors.

My strops look nothing like yours. They are dark, soft, and very slick. I have oiled them with neetsfoot and/or olive oil and clean them daily before each use.

The vintage linen well washed, rolled and stretched is the prize. Love the Kanayama linen. I have both the vintage Brown and Cream linen and cannot tell any difference between the two in performance.

It is often recommended to polish Cordovan shoes with a polished deer bone to remove scratches and creases in the vamp of a shoe. You burnish the shell, smooth, and force the stuffed oils to the surface.

Waxing with a high-quality shoe paste wax is also recommended for shoes. I have waxed veg tanned calfskin strops as an experiment with Goddard’s, quality furniture paste wax with interesting results. Vintage Goddard’s is Bees wax, mineral and lemon oil. I have several tins of vintage Goddard’s Lemon cabinet makers wax squirreled away, it is no longer in production.

I have never used a bone, but reindeer antler is readily available from any pet store as dog chew. It can easily be sanded smooth and polished to a high sheen with any good metal polish or a buffer and Stainless Green compound. I have used it on shoes with good results.

Polished Deer bones are available for sale from quality shoe merchants but are pricy. I would imagine stropping a razor as you have done, is doing pretty much the same thing.

Sad that the quality of these strops is fading fast. Looking at the photos of your strop, on vintage Kanayama the strop edges appear to have been waxed and burnished, the new strops roughly cut.