One thing Lexan won't do is crack. They make vandal-proof light fixtures out of Lexan. I made a new rear canopy for my glider out of Lexan and I can vouch that it is really tough stuff.
Lexan is good UV protection, too.
On the other hand, Lexan can be scratched, although not nearly as easy as plexiglass. I would make cloth bags to protect it when not on the door.
John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2013 Silverado 2500HD Duramax/Allison LTZ
WBCCI #9632, TAC TX-10