I think with some small carving tools would be a much better choice. I assume inlays in Bakelite they molded them in. The usual horn inlays seem much more straight forward as they’re way less intricate, though they are also way thicker and have tabs on the back, so no adhesive needed. Keeping the scales hydrated with oil would probably take care of the usual issues we see in vintage razors with inlayed horn.

I need to find another victim and try some different things.