Like the idea of the transport restraints. Not really a fan of chastity belts.

Some further ideas:

Brightly colored handcuffs, e.g.
http://www.handcuffwarehouse.com/pemo750coplh.html
(other models/manufacturers available, including leg irons)

“The Grip Restraint System”
http://www.handcuffwarehouse.com/grresy.html

Finally, one where I don’t have a link to an example, but a “collar and cuffs” set where the handcuffs are attached to the front of the collar. Maybe with a relatively long chain between the cuffs, running through a ring in front of the collar.

That way, the model can reach out with her right hand, but only if she brings her left wrist up close to her collar (and vice versa). Or if she wants to use both hands at once, she’s limited to how far out she can reach. It might make an interesting “nude in steel” set or three.

BTW, my links do tend to be US-centric; I suspect that “the handcuff warehouse” might not be so good a source for you. Do you have any preferred UK or EU links for “toys”?

Additional metal-bondage sets with a key dangling from the model’s collar could be cool. The models hands, of course, would be locked behind her back, or attached to a chain or belt around her waist, or maybe in a yoke, so that she cannot reach the key herself. But it would be easily accessable to others…

This might be good as part of an “Honest Omar’s Hotel & Resort” set, or maybe as part of a “nude in metal” set.

Maybe: Model walks into a hotel room, in leg irons, hands cuffed in front and chained to a belt or loop of chain around her waist, wearing a metal collar with the key to her restraints dangling down from it just above her breasts. Next set of shots (most of the set) shows model sitting on the bed, wrists cuffed to the metal-grill-style headboard, spread-eagle style. Or possibly laying on the bed with arms extended above her head, wrists cuffed with the cuffs attached to the headboard. Or to the footboard, if she’s lying the other way around.

Or for those who want more pussy, maybe the model can be completely spread-eagled, each wrist and ankle cuffed to a different corner of the bed. Maybe with her original metal cuffs replaced by leather ones. Maybe the original shots can show the empty leather cuffs already leashed to the bedposts, ready and waiting, as the model walks in with metal cuffs, and then the metal cuffs can be shown laid out on a dresser or chair, before showing shots of the helpless models lying spread-eagled on the bed.

The storyline can be “Room Service, at Honest Omar’s Hotel & Resort”

I’ve seen the collar handcuffs used a lot but I can’t say I like them much because the model’s arms hide her breasts. Hands behind the back are still my favorite. Secure but comfortable, and better yet her breasts are defenseless…