By Seamus Duff Millie Bobby Brown has won praise after vulnerably sharing a photo of her make-up free face and discussing her experiences of dealing with acne breakouts. The 20-year-old actress is best known for playing super powered teenager Eleven in the hit Netflix show Stranger Things, but also owns a make-up company called Florence by Mills. This week, the star took to the social media page of her make-up brand to open up about her skin concerns and insecurities. The actress – who is engaged to American model Jake Bongiovi, 21, who is the son of rock legend Jon Bon Jovi \- uploaded a phot…