I am absolutely in love
with casting as bondage. Over at http://www.CastYourEnthusiasm.com
, I use fiberglass, not plaster, however -- dries faster, much less messy. It is relatively inexpensive to get started -- unless you're buying tons and tons of fiberglass, it's not too pricey, and the other materials necessary for a cast (stockinette, padding, removal saw) are nominal. I would urge anyone who enjoys more restrictive, rigid bondage to try it. A full bodycast tends to require a lot more work, but if done correctly, can hold a subject comfortably and completely for hours on end. (I actually had a session last week where my client wanted to be kept in a cast for 2 days, straight. It was incredible how little movement he had!)
Anyway, bottom line -- I am a complete proponent of fiberglass casting. It's easy to learn, and one of the most satisfying, rigid, inescapable bondage experiences one can have -- from the top, or the bottom.