Just a quick little note that may be of interest to people.
I used to be a professional sword fighter for lives shows, film etc.
I experimented a lot producing a spark when the swords clash.
I have achieved this by coating the blade in flint.
Also i achieve this by hooking the 2 swords up to car batterys vie the pummel and hiding the cables down the sleeves.
The Honourable Grant Meredith - CEO Sick Individual Productions
http://www.sickindividual.com
Profile : http://www.innersense.com.au/mif/meredith.html