Outland Models Railway Layout Modern City Building 4 Story Office N Scale This product is created by a 3D printer Just like most other 3D-printed products, when you look at it carefully you see the printing patterns, paint can be used to cover them if you don't want them visible If you would like to paint this product, acrylic paints are recommended Assembly is easy, glue is not required but recommended 'Glass' for windows / doors is included, no interior details