"Can I buff in a food grade mineral oil, coconut oil, bees wax or the “board butter” that my husband uses on his cutting boards?"

Yes, you can, but why would you?

Corian doesn't need any topicals, but if you've got a darker color and want a bit more shine and water beading, make a little room and get some Countertop Magic, please.

@Joseph Corlett, LLC, thank you, and yes. Just a bit of a barrier and shine. The color is juniper, a medium blue which has a gloss finish. I looked at the ingredients for Countertop Magic and I prefer to avoid the synthetics. Thank you!