I agree with everything that's been said so far. Honing a razor is one thing, repairing a chip is another. It takes a bit of skill and practice. I'd send the Hart out to be repaired. If you've never done it, I wouldn't start the learning process on a $300.00 razor. When I repair a chip, I lift the spine off the stone, and hone at an angle, almost like you'd sharpen a knife. It's quick and effective. In any case, You have the right tools for the job. I'd practice on a inexpensive razor first.