Sorry I'm not sure if this is an okay forum category. I am wondering how to sharpen a knife I have. It's a custom balisong that I just had resharpened by Larry Chew. A few months after, I dropped it and made a tiny chip in the tip of the blade. I would like to fix this myself, but the little sharpening stone that my friend gave me does absolutely nothing to the blade. How can I fix this little imperfection in the blade? Can you recommend a sharpening stone that will definitely work? Thanks