Milk of Magnesia

I don’t ever recall discussing (maybe I missed the discussion while getting my MBA) this for treatment of seborrhea but there are lots of claims on the internet about topical use of Milk of Magnesia for seborrhea. Has this been discussed before on here or somewhere else? Has anyone used it?

http://www.peoplespharmacy.com/archives/herb_home_remedy_qa/milk_of_magnesia_worked_for_donut_face.php