[CarlosGJ]

For the past two years, team 418 has used 1/2" Kevlar honeycomb for structural panels/electronics mounting. We get it from a contact in the aerospace industry (apparently, it's the stuff used to make floors in airliners). It cuts fairly well with a circular saw, although cutting tends to generate a lot of dust: do it outside. While it is very strong and rigid, the faces are not very tough. That is, a sharp impact (say a ball-peen hammer) can crack the surface. For the same reason, we generally use large diameter washers when bolting or riveting through it.