Thanks everyone. I'll give it a try on my own with the belt sander and follow it with the Makita. I was concerned that was too barbaric for a good old tool.
I'll try with my most beat up one first.

I have a 2" bevelled-back with a heck of bite out of the edge. I figured to use a beveled block of wood as a rest and grind with the cutting edge trailing.

For what it's worth, I'm sure happy I switched from water stones to diamond stones a couple years ago.

Happy Solstice.

Zach