Scenic backdrops -- art boards / art supplies?

[RobertInOntario]

Has anyone tried using art boards for scenic backdrops for layouts? I was at an artstore recently, and was impressed by the strength and how light weight their art boards were. I also recall that they weren't too expensive.

The only problem is getting one that is the right size / dimensions for my layout, which would be 68" long by 8-9" tall. So I'd probably have to buy something and cut it down.

Has anyone else used such art supplies or have other suggestions?

Thanks,
Rob