Halloween wall plaque/ pillar decoration

Yes Im already working on this coming years Haunted House, one idea is to have "brick pillars" flanking the drawbridge but like everything else they need to be easily disassembled and stored so I thought about foambaord as the backing. Well foambaord isn't going to work at least with this process because it warps and twists in multipul directions so this piece will be remounted on a plywood backing and just hung somewhere. Some of you may have seen my winged skull "ible" this is pretty much the same proceedure

Step 1 The mold

I'm using a plastic halloween decoration with a skull imprint as the mold, layering ripped pieces of toilet or nose tissue with acrylic paint as a wetting/bonding agent forms a hard plastic like form. Kind of like fiberglass and resin the tissue adds strenght to the dried paint