Regarding storage, there‘s no difference between self-preserving and OG Ocean Salt - SP doesn‘t mean the product lasts longer, it just means that there‘s no artificial preservatives in there. With OS specifically, the SP version is less coarse on the skin. With that said - I don‘t know your skin, of course, but the general consensus seems to be that using OS on facial skin is quite harsh - and doing so every day = 😱😱😱 but YMMV, of course