Scrapyard steel would be perfect for throwers because throwers have to be tough enough to handle all those brutal hits and bounces into the floor. Something like a Ranger shiv or a CS Tru Flight thrower with a usable edge would be awesome.
The only thing is you could not have a res c handle as those things bounce like a superball. I had my SS4 come flying back at me like it was trying to chase me around the room.