Well, you got me, too, @foxyspirit! In my experience, corpsing was when an actor laughed at an inappropriate time during a performance. So... Interesting techniques, but myself, not being a fan of skulls and skeletons, am likely to try them on something else! Good luck and please do share the finished product!
Oh you taught me something, I didn't know that.
What would you try to do with them? You have got me intrigued :)
It's British theatrical slang. I don't think I explained it very well - here's a link to the Oxford Dictionary that will explain it better.
https://en.oxforddictionaries.com/definition/corpse
Not the brightest button at the moment, I'm not! ;)