I was just about to ask if anybody had tried sandblasting. I was thinking a real fine grain sand and being very careful with the settings, but I never thought of using banking soda or walnut shells. I'm not that familiar with sandblasting other than some I did years ago to remove some rust on car parts, is the walnut shell something you can buy that is designed for sand blasters?
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Mark Smith
Tracy, CA
Mark's Custom Woodcrafts
Legacy Artie 58 CNC
Hurricane Ivan 60 Watt Laser