FWIW: the chef knife guys talk a lot about how the naniwa's do glaze with swarf, and how this can be helped by soaking them 10-15 minutes before use, and/or lapping.
I really want to give these stones a try but there's something about using the King stones I have until nothing is left that appeals to me, being my first stones and all. They're good enough for me, for now. (there's a 1/4 ton gorilla in the room and his name is HAD!)
You'll figure this out. go for a walkabout, vision quest, sweat lodge, whathaveyou, and come back with a fresh outlook.