Weaver Bird !!!

Okay i know how to add a skin over a surface using weaver bird but I´m trying to cover 3 polyhedrons at a time with one single skin instead of all of the figures to be covered by a single skin, sort of like in the crappy sketch below.

So yeah... I dont want the whole definition to cover all of the polyhedrons i just want to cover some at a time... with a single skin.

Thanks