The paperclips sticking out are what I'm going to mold the greenstuff around to represent the spray. I'm also going to try a trick Dr. C gave me about glue and ink that will hopefully give a more watery effect to the the acid idea. I'm not that great with green stuff, so modeling organs and intestines blowing out will be the hardest part for me. The little bit of greenstuff you see is to represent a flap of skin that tore away with the tube when he exploded. I'm going to fray the edges a little more, but I figured starting with that little bit will let me learn how to model the edges of the blown out stomach. I will keep this updated as I go along, hopefully it won't be too long.
Edit: 9/28
Okay, no new pics yet. I've green-stuffed a heart together, and though it looks a little big for the model it works for me! I've also rolled up some intestine, which was easy so luckily if I need more I can make it in no time! However, as I attempted to model liquid-looking bits I came to realize this is going to be harder than I initially thought. So I'm cheating... I've ordered the vomit bits from the GW River Trolls sprue to give me some prefabricated liquid bits. I figure I should be able to model from those with a little more ease. I also just got some skeleton torsos from Bobby, which I'm going to chop up for the use of rib and spinal column bits. Once I get the River Troll bits I'll give it another go and post something new up!
Edit: 10/3
Yay, new pics!! I've done a little work as you can see. I've added some green stuff to the edge of the hole and tried to fray it, though I think I need to trim down just a few more pieces. The big thing is that I've also added in a piece of broken spinal column and some ribs to the piece.
Next I'm going to mix up some Elmers glue with water to try to create a little bit of a puddle inside the stomach area. I'm going to try it in a small mixing bowl first in case it doesn't work, but what I'm hoping is it will dry clear but thick enough to hold a piece of plastic inside. This way I can add clear paint to get a bloody acid effect and the green stuff organs to the puddle then, using the river troll vomit bits that just finally came in the mail, work my way out with the explosion.