I bought these to glue up on my bathroom ceiling. It is a popcorn ceiling so I thought it would look a lot better BUT these are styrofoam. I knew that when I bought them but I thought they would be nice and thick. They are very thin and they are the kind if styrofoam that you get in a restaurant to go box. Shiny and thin. I will still try to use them but I am concerned that paint will not stick to them