I would just add a caution about a nut or tree nut oil, such as walnut oil. I have a daughter who is allergic to nuts (have not yet explored which ones, totally) and she goes into anaphylactic shock and needs a shot to get her out of it from contact with them. She has picked it up from something that does not have the nut in it, but something that was just processed in equipment that previously processed nuts. If you were just doing something for yourself and are not allergic to anything, no problem. Just a caution.