Hows it going. I bulk up my characters using different types of foam. Black foam pipe insulation makes awesome muscle strands that are lightweight and cheap. pool noodles from the dollar store are also great. I use a rigid foam back for the torso. The picture up top is how I made last year's fill. The bottom pic is what I am using now. This this year is wanted to go a little more detailed in case the cloths are ripped, etc. The muscle torso is a cast of expandable foam mixed with recycled packing foam. Mixing in a solid is important as that stuff that comes out of a can is not so great as it shrinks alot when curing.