Although I really wish they would get a new announcer. I can't stand listening to him anymore. His constant repetition of another "significant find", which I know is the writing not him, is really annoying.
Jim, this might seem odd (then again everything from me is odd) but you could try some talcum powder on the WW's. I have had success with sticky vinyl in the past. Dust it on and let it sit a while.
That's an old way of casting an item. It was commonly used to make toys and figurines back in the day. It's a single sided mold that forms the outside of the item to cast but there isn't a mold on the inside. The material used for the item is poured into the mold and swished around to fill all the cavities of the mold. It is still used for making things like candy to this day. Think about those hollow chocolate bunnies for Easter.
So the inside of the item cast is of an uneven thickness and rather crude and for a model body requires a lot of cleanup.