>From: Adrian Jones




>As for sharpening, could you make some lengths of wood the exact profile and
>glue on various grits of sandpaper?

Your question triggered a memory. 
In ancient times early Galoots used a very convoluted process to create such a
tool.
The long drawn out explanation is here: 
http://books.google.com/books?id=v98DAAAAMBAJ&pg=PA330&dq=make+emery+wh
eels&hl=en&sa=X&ei=V86PU8zfHIGYyASqzIKoBw&ved=0CEAQ6AEwAA#v=onepage&q=make%20eme
ry%20wheels&f=false">http://books.google.com/books?id=v98DAAAAMBAJ&pg=PA330&dq=m
ake+emery+wheels&hl=en&sa=X&ei=V86PU8zfHIGYyASqzIKoBw&ved=0CEAQ6AEwAA#v=onepage&
q=make%20emery%20wheels&f=false