Wood for a cutting board, will sanding make it food safe? I would like to make a cutting board from some hardwood I have. I'm pretty sure it has been imported, so I think it might have been fumigated or treated for insects/pests at some point. I've tried researching about this but I found very little, but the little I did find suggested sanding it as the fumigation process would only leave chemicals on the surface. Does anyone have any input? It looks like a good beginners project but I want it to be as food safe as possible.
If you think the wood was treated or fumigated, I wouldn't trust sanding to make the wood food-safe. As another answer notes, wood is porous and could very well have absorbed the chemicals deeper than you'll sand out.

I would definitely err on the side of caution here and only use wood that you know is safe to begin with. There is no finish that you can use on a cutting board that will keep the base wood completely out of contact with the food, due to knives being used on it.

I would recommend starting with hard maple. It makes durable, great-looking cutting boards, and is completely food-safe.