I've shaved off a King 4K, because that's the same as a Norton 8K. 4K JIS - 3 micron. 8K mesh - 3 micron. Both synthetic waterstones.

I get my knives to shave arm hair with a single cut bastard file or 36 grit silicon carbide, then take them all the way through to my finest finishers, which are now 10K Naniwa Super or translucent Arkansas followed by a kiita. Used to do 8K King followed by chromium oxide strop.