I did just that for years. Now I have a tool room full of razor sharp machetes, ready for Summer. Took a while for me to use it on expensive blades. I'll have to check out the spyderco.
Watch the heat some steel will burn quick. S-7 is a hot steel and holds it's hardness up ~1000 degrees so its forgiving. I'm guessing that SR-77 should be about the same.
Bors