Beautiful piece. I was a little surprised that you didn’t pop the grain between the final sandings since it will be washed and raise the grain. Or, maybe you just didn’t show that. Anyway, very nice project and keep up the good work.
They're mostly used in cast iron and ceramic pots so it won't scratch them up. You can use them with anything, just like a regular wooden spoon. I don't recommend stirring highly acidic foods with it, like tomato sauces, but if you clean it up immediately it should be okay. It'll eat through them and make them brittle if you let them set with stuff like that on them :)
How does the band saw feel cutting the inside curve compared to the outside curve? I've only ever used hand tools for shaping so this looks a mite tricky