My spark eroder is of the falling electrode style, so the best I could do would be to etch your initials into the file...
QQ Andrew - how is the stock material held in your wire eroder? Does it rest on a mesh, a bit like a plasma cutter, or is it clamped at the edges, or something else? Reason I ask; I was wondering if it would be able to cut really small parts (say 70mm long, 4mm wide, 1mm thick stainless steel)?