Actually just got off the phone with people regarding this plastic, since I am in the sign industry and the best bet for what we would be doing is called High Density Polyethylene formulated for the marine industry. It has a very high degree of stability, inertness to marine environments, good flexibility and toughness, good dielectric properties, excellent as a barrier against water vapor penetration, ultraviolet (UV) stabilized to resist direct sunlight degradation throughout. The last point is important because if you just get normal HDPE, it does not have UV stabilizers which means it will degrade on your Jeep when hit by sunlight.
You can get it in any thickness, starting at 1/4" and buy it in full sheets for about $98. Better yet, you use this as lower rocker protection, even put in on the bottom and sides of your rock rails and frame...because you will be able to slide over rocks, not scrape over them. You essentially would be cutting the friction coefficient out of the equation when coming in contact with boulder, rock, etc. Best part, it's cheap, easy to replace, is drillable and already comes in like 5 colors, sand, black, light grey, dark grey, white, sea foam :laugh: .
I guess from my point of view, anything that you put body protection on, or skids, I would put this on the skids, ie control arm skid, transfer case, gas tank, rear bumper, etc.
I'm ordering a full sheet today and am going to mess around with it. I have a great contact at this company
http://www.thecuttingboardfactory.com/two.html named Joe. If you go to that site, click on the "product showroom" to see the marine grade stuff. If you call him, tell him that Chris sent you regarding Jeep stuff.
Chris (Double Down)