Thank you Gentlemen for the clarification
I would call it panelling lol Good to know the correct terms
I have been using Evergreen Plastic sheeting and Plastruct for materials
The wainscoting is O scale 3 1/4” car siding as well as the roof soffits that I ripped to 1” strips on my mini table saw
Stocked up on some more plastic supplies and glue today at the local train shop
Al