I would recommend looking at and contacting someone from 1714:
http://www.thebluealliance.com/team/1714/2012
They do not have a 2016 picture on Blue alliance, but there are pictures from several other years. They often build a "clear" robot.
FRC 703 also used to build a lot of chassis components out of Polycarbonate.
Lexan or polycarbonate is a wonderful material, and with proper techniques can be an incredibly useful material.
Many teams use the very thins stuff (under 1/16th and sometimes as thin as 0.020") for body panels with graphics. Well applied and designed body panels can make a robot get a new personality and have a much higher appearance of quality. when applied with Velcro, the panels offer easy access for pit crew, but a reasonable deterrent for other robots poking into your bot, or it getting hung up on field elements. The thinner you go, often the less robust.
Other good plastic parts are skids and sliders often made of UHMW or HDPE plastics. These can be good skids and guide for elements that strike field elements.