my favorite synthetic stones for finishing are the Sigma power 10 and 13. but I much prefer natural stones approaching a similar range of sharpness such as cotis and thuringians.
I have a Naniwa 10K and it can produce a decent edge. I like sharper than that so I still polish up after it on a 16K gem stone or on crOx.Would you recommend any stone such as a Naniwa 12K grit or any other as fine perhaps?
if not, I'll stick to stropping.