If you leave the salt out the oil will allow you to rub the muscle deeply and promote fresh bloodflow full of oxygen and nutrients to the area to help it repair itself without irritating the skin with the friction. Also do some research into “comedogenicity” and try out some oils that are less likely to clog your pores to see what works best for your skin. I’ve personally had the most luck with Argan oil but every body is different. If you leave the salt in you can get a good exfoliation going so maybe save that for your feet.