I've been asking around and have gotten a different answer from each person I have asked, so hopefully there is someone here who can clarify this for me. How do you use natural stones? Are they for sharpening or just for putting finishes on your knife (Polishing not sharpening)? Can you use them for sharpening and still get decent results?if they are good for sharpening, just as finishing stones, or medium (grit) stones too? What do you use, which stones do you recommend?