Those headlights were a real mess upon post-wash inspection. Lots of water getting inside the lenses made me worry if what I was about to do was going to help. I didn't use any sandpaper here.
Products Used for Headlight Lens Restoration:
Befores:
POW Turned AROUND!
All that was left to do at this point was to touch up the glass, knock the dust off one more time, and snap some pics!