On Jun 15, 10:51*pm, wrote:
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.

So will a piece of spark plug ceramic.