So I'm new to the Eva foam game, and also new to costume/prop building entirely. So my situation is. I have built a chest piece out of foam for my arkham knight INSPIRED batsuit. While I'm decently happy with how it's coming along, I want to add some depth, and realism to it. I would like to be able to sculpt on top of the foam, but Idk what would adhere to it, be light enough, etc. Is there a method, or ten for this? I've seen people use clay smoothing seams, and sealing with pva glue, but idk if that would work. Any help would be greatly appreciated.