I wanted to give this tip, that has helped with the past couple years, to save some serious cash, and something that works great for various effects! Latex caulking! I've used it on several of my own variations on Derek Greenwood's tutorials, sometimes to replace the hotglue, since its cheaper.(Doesn't dry as fast or as stuff and durable tho) I used it once as a coating on cardboard tombstones, you can also add some sand in the mix to make it even better! I've also found that it can give a great rubbery skin like texture to demons or whatnot! Its defiantly something you should experiment and work with a bit, its messy sometimes, but I love that stuff!