I thought about using Kapa-line board for the masonry on my set rebuild but it is rather expensive and using embossed wallpaper served just as well for my purposes. This Page from David Neat's Web Site suggests some of its possible uses so I thought no harm could come from posting it here. Kapa-line, however, is only available in the UK and, possibly, from one distributor in Australia.
There is an alternative product similar to Kapa-line and here is a link to the London distributor.
Nick, Neat gives this link for the Australian distributor. Had a look but couldn't find the actual location.
Hmmm, well okay, I'll look into that on this end. Or, I can always send you a sheet if you want to experiment a bit. Wouldn't mind trying it out myself.