Heh, I dunno, I presume they know what they're doing and are doing it the best and easiest way. :) I think they're like those removable tattoos; they put it down on his skin then use something to rub it on. Or something; I don't remember, though there was a special on the s1 DVD about it.

Anyway though... yeah, it'd be neat, but for Went's sake I don't really see it being feasible often. I imagine we'll see it every once in awhile again, but why go through that every episode just to show it off? It's not worth it. Probably costs money every time, too.