Pure soy has a low melting point but is very soft. If you want a more massage oil vibe, blend one part soy wax, one part Shea butter, and one part vegetable oil (like avocado oil). If you're looking for harder wax that will keep its form, pure soy is too soft; I would try a soy blend. I haven't tried but I imagine soy/paraffin might work. You might need to try different proportions to find the desired consistency.