Lots of progress today!
First, got the black and white laid in with the sponge- turned the bare grays into a more granite-like look:
Once that was finished, we were supposed to weather the panels with some washes and color variations. However, it was easier (and more educational) to simply wash the entire surface of the stone with a thinned down color, which we were able to do in very short order:
Okay, maybe the colors aren't representative of "real" stone, and maybe they're too bright, or not tied together...but the really important thing is that today a love of Halloween- including the building of props and development of a theme- was passed along to a young girl...who will continue to be a part of our haunt until she grows and moves away and develops her own haunt- and one day, she can pass it along to the next generation. I'd rather teach one child about the fun of building and decorating than create the greatest prop ever...after all, we do it for the kids!