Aluminium foil works for this just as well. Or a cheap faraday bag. You don't need to fund a $75k project. To answer your question though, yes it would have to

Aluminium foil works for this just as well. Or a cheap faraday bag. You don't need to fund a $75k project. To answer your question though, yes it would have to. In order to dissepate electricity it would need to be conductive and a Faraday cage is any closed conductive surface (though in practice you can have semi-open conductive surfaces just as well).