Danish oil is a "drying" oil finish. wax is wax, and shellac is a whole different thing. I wouldn't use shellac over a drying oil unless it was on there for at least year or so to harden up, and then it results in an entirely different type of finish.
it depends on what type of finish you want.
you sound inexperienced in wood finishing as your first post references a "pure wax finish" and your second, an oil followed by "wax".
an oil finish can be wonderful, but you need to apply multiple coats, with appropriate "drying" time between coats to get the best result. that time could be a week or so, depending on conditions, and possibly abrading with 400 or finer grit and/or or bronze wool between coats.
a "wax" finish is a very different thing than an oil finish, and I'd say the primary selling point of one is a low to high sheen without a thick or gloppy look, but the low sheen at least can be achieved with a well done multiple coat oil finish.
applying a high quality wax finish like "museum wax" or one of the classic French or English (pardon my magnanimous multilateral national allegiances there,I've got both in my heritage) furniture products, is an art form in its self, and is best done over a good sealer. I think 4 coats of shellac, with at least two grades of pumice between, and then 3 or 4 coats of a quality wax is a traditional fine furniture finish, but im a metal guy, so please correct me here!
just give it 3 coats of "danish oil" and don't store your rags inside.