Dabbing water at the edges wasn't working. This photo was taken after the first swipe down the backside. The old skin peeled away like wet paper! King didn't much like me messing with him so he kept dragging the skin along.
Now someone on the forums suggested King isn't a Theraphosa blondi after all, but rather a Theraphosa stirmi (a Burgandy Birdeater which is a new and popular Theraphosa species on the market). So we'll be researching that. He was sold to us as a T. blondi.