The heel spur is the sharp point of the heel that is rapidly turning into a hook. (First photo at the arrow)
The smiling toe is the rounded and curving toe and toe end of the razor. (2nd photo).
You cannot hone a rounded curved toe with straight strokes. You will have to use a rolling X stroke to hone the curve.
The heel hook, will have to be removed, ground even with the edge of the razor, and the heel ground in an even curve. (3rd photo).
This will allow the middle edge to be honed, as well as the heel. A diamond file, diamond plate or low grit stone will grind the spur even with the edge.
Look at the Make me smile post for how to reprofile an edge for tools and how to.
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