I have often looked at waste canvas and decided it would be great with silk ribbon embroidery on linen. I have never attempted to use the waste canvas because it says 'wet to use' and I always feel silk ribbon loses some of its depth when you wet it.
Here is someone who says that wetting it is not neccessary! Come check out
She has also featured her elegant crazy seam volumes (which look so pretty!) so be sure to check them out!