I would think if you had a coffee bead grinder you could grind the shells in it. I have a lot of Filbert/hazel nut trees in my yard and may try some to see how it works.
Originally Posted by
kaysue4
Now I have found a use for all of the walnut shells that the squirrels leave empty for me in the back yard! I guess I would just bang them down with a hammer, right? I am also taking the whole green walnuts and putting them in water to make walnut stain.