Pixie and Genie grinders

Hi! I use my pixie for grinding down cloisonne. I have started
using the corsest wheel for grinding sterling settings instead of
using my belt sander which always builds up static electricity
and shocks me. Does anyone know if it will hurt the diamond wheel
to use it to grind sterling? Of course I use it wet. It’s kind
of nice because there is no dust. I use thick cloisonee wires and
it’s great for a quick grind on those. I love my pixie!! Sue
Knopp