I'm trying to make something like this:

http://sports.webshots.com/photo/121...44194919ClRBmi
http://sports.webshots.com/photo/121...44194919EvrnCe

and am not sure what sort of aluminum to use. The person who made
that descibers it as:

"I carefully and gradually bent them over my thigh. The material is
1/4" x 1.5" aluminum that I bought at a hardware store and the bases
are just two layers of 3/4" plywood laminated together. When I bent
them, I just eyeballed the curves and left the ends longer than I
needed, so I could adjust the shape."

I have the choice of buying 2024-T4 or 6061 T6 -- will either of these
work? What would be more durable?

Thanks in advance for any advice.

JT