Stumbled upon this on google, as I was doing some research on retrofits:

DIY coke can curved into a U-shape to prevent reflections from the reflectors going in an upward (glare) direction, therefore the only light that should be reflecting off the reflectors is light shining in a downward angle.

Looks something like this:



Or if you wanna be real professional about it it can be made professionally like this:



Not a bad cut off neither:



Here's some links:

http://www.elantraxd.com/forums/show...-glare-shields
http://forums.mg-rover.org/showthread.php?t=293708
http://www.hachiroku.net/forums/showthread.php?t=700
http://www.clubcivic.com/board/showthread.php?t=186085
Or just google it.

So what do others think? A good idea or a recipe for disaster? Judging from the links/feedback, so far so good naman...