I've seen wire trailing edges being used on WWI models built from Mick Reeves plans. Not only that, but also rudder or elevator outlines consisting of soldered wire. This might be a useful link:
http://www.rcscalebuilder.com/forum/...p?TID=543&PN=1

Here's one of that thread's images.

Looks very scale, don't ask me how it's done though