The only thing I'd tell you do to is be careful if you have multiple kits because some of the small pointy pieces can easily be mixed up for actual debris if you're not paying attention. I didn't have that problem as I'd already put together almost everything. Only the crane at this point is really making me scratch my head as I've got the two different pieces of it assembled, I just for the life of me can't figure out how those two pieces go together. Glad to hear that he'll be putting some instructions and other bits together soon.
I used some of my old Games Workshop foundation paints on this. Trying to get rid of them and test out the new ones that I bought for Thanksgiving with a good deal from my local FLSG, Games Plus.
I was thinking about putting some blood splatters on the center of it as the druids in the Hordes setting are not kindly individuals. You might also be able to see those limitations I've spoken of before with the methodology used here where the cutting of the non-straight parts is fairly grid or step like between movements. The other limitation is the flat surface. Mind you, it cuts a perfect symbol into the stone but no variation on the surface of the stone itself.