Geez I forgot what I wanted to post with the stonework, IDIOT....
I experimented with a lot of things to get the right "look" for the wall and in the end I used a couple Woodland Scenic rubber molds with lightweight Hydrocal, in all I think I have about 10 different poured rocks in there.
I also used just (4) paints to get the color I wanted. Woodland Scenic Stone Gray as my base color, then a black acrylic (with some water) as a wash over craggy areas then drybrushed some acryllic Milk Chocolate color and basic white on the tips. I think it was effective.
Terry