Most mirrors are covered in glass which greatly reduces the effectiveness[0] (also now you live in a glass house..) If you don't use glass you will have aluminu

Most mirrors are covered in glass which greatly reduces the effectiveness[0] (also now you live in a glass house..) If you don't use glass you will have aluminum oxide which is much less reflective. So paint will always be better. SSS doesn't really matter (and is prefered, imo) as long as the light is being reflected out of the material in the end. [0]visual proof: https://i.imgur.com/Ar80FYZ.jpg https://i.imgur.com/Ar80FYZ.jpg