Anyway, to update, I lapped the 1k on 400 grit paper on the ceramic tile and it came out quite smooth (apart from the chip). I also hit the 4k Norton on the 400 Grit for a while, after giving it a good working-over with the flattening stone. The 400 grit sandpaper worked faster than the 220-grit flattening stone. The 4k side of my hone looks like it still needs more lapping, as it has areas that aren't smooth. I've been told I need to lap a good 1/8" from both the 4k and the 8k, so I think I have quite a bit more to go.