If you want to protect the plastic from your rubbing knees or whatever this might work. I tried the plastic that you need to use a hair dryer to make it look good it was difficult to install and he edges peeld off. This looks easier.
http://www.wingstuff.com/pgroup_detail/24710_Road_Warrior_Plus_Paint_Protection_System
http://www.wingstuff.com/pgroup_detail/24710_Road_Warrior_Plus_Paint_Protection_System