Probably the only way to make it reliably foodsafe without a lot of postprocessing would be replacing the parts frequently. It's possible to perfectly merge the

Probably the only way to make it reliably foodsafe without a lot of postprocessing would be replacing the parts frequently. It's possible to perfectly merge the layers by printing with 100% infill, burying the part in fine grained salt and then remelting it in an oven, but that takes time.