Quote Originally Posted by Kees View Post
Best thing to do is lap it with sandpaper. For Thuringers I use 220 followed by 400 grit sandpaper befor I send them to buyers. Just a piece wrapped around a wooden cube that is slightly bigger than the hone's width.

Much cheaper and just as good as a lapping stone.
I agree with Kees on this one. The Belgians and other slate based hones can be lapped flat with sandpaper because they are so soft. Use a coarse grit, 220-320, until the stone is flat then use a 600 followed by a 1000 grit to obtain a very good finish on the hone.

Just my way,