If you still have your old one with scratches, look up the procedure for restoring headlight lenses (Youtube would probably be the best place). It's not difficult, and if you take your time and do a good job, you won't be able to tell it from new.
Keeping dustcover looking new
Just bought a new dustcover for my TT ,love the clean,shiny, no swirl-mark look. Any tips on keeping plexiglass looking good?. In the past I would lightly dust with Windex,but over time the hazy swirl marks inevitably appear. What do you recommend to protect a new DC? Ive heard car wax, Armorall, rain-x, etc. Any ones experience is appreciated.