On Tue, 15 Jun 2010 23:35:34 -0500, "DanG" wrote:

Jean, if you are talking about the panes, I am surprised you have
acrylic. There is polycarbonate - Lexan is a major brand - that
is virtually indestructible. You can smash it with a sledge
hammer with no visible effect - great stuff, but it scratches
easier than the acrylic.

As others have said - consider real glass. For breakage you can
go to tempered or laminated glass. When tempered glass breaks it
disintegrates into fingernail sized pieces with relatively
non-sharp edges: it can take quite a beating.
It can take quite a beating, but NOT a shrp impact. An automatic
center punch will destroy even 1/4" tempered glass in an instant.