If it is the polished diamond plate it is probably a 3000 series
aluminum and can be bent and formed fairly easily. If it is the dull
mill finish it is 6061 and does not take bending or forming without
annealing first.

john wrote:



6061 t6 will most likely crack before you complete the forming. If
you anneal it it will eliminate the problem, but then you will have to
get it retempered.

A cheap and dirty way of making them is to make a form out of hard oak
wood and pound it out with a ball-peen hammer into the form. Start from
the middle and work outwards. You may have to anneal the metal as you
go if you workharden it too much. Make sure you polish the end of the
hammer so it will not leave marks in the aluminum.


John