Hi
I want to make a scraper for flattening plane bottoms.  I would like to use 
a machinist carbide insert for the business end and make a handle.  I can't 
figure out the labeling system on the inserts (ex: SPG422).  Also, I don't 
know what grade of carbide to get for cast iron.  Does anyone know what 
would be a good size, shape, and edge treatment for the insert?  Any ideas 
on how to make a handle?

Finally is Dykem "Hi Spot" the ink I need for my Far East granite plate?

Thanks in advance for any help you can give.

Joe West

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