Best way to polish bone?

I’m making some flat bone pieces for a project and am wondering what
would be the best means of polishing the bone. I tried buffing some
scraps I had sanded, experimenting with several compounds, and found
they left specks of compound in the micro-cracks and pores in the
bone that I couldn’t remove. Suggestions on how to polish bone?

Thanks,
Susannah Ravenswing
jewelsofthespirit.com