Well in the case of these knives it removed the secondary bevel on the puuko in no time. Before I tried the Jarvenpaa blades though I tried an old knife with a nick in it and it melted away in no time.

It's a good thing 220 is only rarely needed...the stone melted away fairly fast too...but that's how water stones work.

The Leuku had a bit near the handle that looked like it was an oops on the grinder. I ran it over the 220 only for a handful of strokes to make sure the bevel was in line with my regular sharpening stroke (I decided to keep the 2ndary on the Leuku). It almost disappeared right away.

The Puukko definitely isn't hollow ground but it isn't perfectly flat either. It feels like the angle changes as it gets closer to the tip...and I think the angle isn't the same from one side to the other either.

I'm just going to use it now and give it a proper sharpening on the water stones when needed and I'm sure it will come around eventually if I'm careful about how I run them across the stones. It's got a single bevel and it's damn sharp...so mission accomplished.

I'm going fishing this weekend so between casts I'm going to knock the rust off of what little bushcraft I know and see what it can do. If it needs a touch up, I have the pocket water stones. I'll just soak them in the river and they'll be perfect for it. My wife will be trying to show me up and catch the big one so I'll try to get her to take some action shots.