What’s the science say about salt and magnesium skincare?

I’ve been seeing a lot of diys circulate for magnesium oil and sea salt toners (presumably for the magnesium) but after some extensive research, there’s just not a lot of evidence on dermal absorption of megnesium. But what about topical? I’ve seen claims that salt and magnesium are used both for moisturizer and drying, from pain to acne. Any validity in the benefits claimed for for sea salt or magnesium in lotions, creams and toners?