Hi All,

I've just notice that my new (ish) chinese 12k waterstone isn't completely flat. It's not far off, only just detectable when i laid it on a piece of glass, but i'm still obsessive enough to want it perfect!

Question is: what the hell do I use to flatten it? i used wet/dry sandpaper on glass for my norton, but it seems that the chinese 12k would be a lot harder. Or am I wrong?

Has anyone flattened one of these before?

Cheers,
Ian.