By the by, I've used and had some success with this.
https://www.deansart.com.au/embossed-pebble-paper-a4-pe106-charcoal-blackIt takes paint well, mine took a base coat, dry brushing and a wash in parts. Not as thick as wallpaper so dead easy to cut but seems quite robust. Comes in usable A4 sheets.
I've got it glued as the backing to urban mdf terrain squares and removal from and placement back into their storage boxes hasn't created any issues yet.
It comes in a variety of colours. I went with the charcoal but as it was sprayed all over and then drybrushed I'm sure the silver (which isn't really silver) or even the beige would have worked just as well. When I get back I can bung through a photo of what it looks on the board if you like.
That wallpaper would be perfect for doing a large town square, which is on my to do list, so thanks again!