I ran across an article about turning an end-grain bowl out of spalted birch. When it comes time to start sanding (at 60 grit), the author sands with a wax that's 2 parts mineral oil, 2 parts vegetable oil (the part that seems odd to me) and 1 part bee's wax. Evidently, using the wax is only for the first sanding run. Anyone else find this helpful? Major downside(s)? I have some old Johnson's wax that I reserve now for use on tools. Good idea for sanding?