Originally Posted by
maidenfan
Black w/some sign reflector material on it (thats what I did). Got the stuff for free from my local county sign shop (ask for scraps). Stuff is blindingly bright - cars change lanes for me now.
Heres what it looks like during the day
And with lights on it

Great idea. Can I assume correctly these are flexible signs and not the rigid type? Also, what did you use to attach them to your fenders?