Placing the plastic Lionel portals on a layout basically says to layout visitors, "These are toy trains (mostly) made by Lionel." I have two of them on my layout and have left them deliberately looking exactly the way they came when they were new. I also have several portals I carved out of pink sytrofoam myself that are weathered, grimy and look very realistic. They're much cheaper than any portal you can buy in a store, including Lionel's, very easy to make and there are dozens of You Tube videos that show how to make them.