Search:

My Naniwas SS are combination stones, they came without any sticker on them and without any residual glue. They were bought as new and looked like it, they weren't lapped when I got them.

I used my naniwa 8k out of the box with no problem, the 5k needed lapping

Place a ruler on the 2 diagonals of the hone and use some light, if the light passes to the other side it needs to be lapped. (make sure the ruler is straight, I know for experience not all are :gth)