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23,784 Posts

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23,784 Posts
Hi gregW
You'er Welcome

MDF will nail the cheap bits and some of the good also just about any man made wood will do it , glues,resin, are hard when the setup and they will have dirt in the boards that is like sand paper.
Look for a 600 and 800 grit , I think I saw one at Rockler at one time or LeeValley...

Bj :)

gregW said:
thanks BJ...I'm using a 1/2" point cutting roundover bit to cut a lot of grooves in MDF.
It doesn't take long before I feel the bit dulling. I'll probably try to find a flat diamond honing stone with a real fine grit to try to touch-up the cutting face.

Greg
 
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