Acetal ain't rattan

[Phil Elmore]

You, too, can turn the modern plastics industry to your advantage.

http://www.philelmore.com/martial/acetal.htm

 

[arnisador]

Shock is transferred readily to the hand.

This of course is undesireable for regular training, but it sounds like they'd leave a dent in something for those "special occasions" that occur.