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If you use a pasted strop, then you have a convex edge.

Depends on the type of surgical instruments you are talking about. A #10 scalpel (what most people think of) is the same sharpness as a straight. A #12 is sharper than a straight. A #18 is not as...

I've seen plenty of knives that were frowning from bad honing aka too much honing pressure.

I think David is just trying to start a fight. :) But I'll join in.

The difference between sharpening a knife and a razor is that the razor is easier because it has a built in angle guide.
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