I have an old visor from my Shark helmet with a few scratches, and one area in particular that's seemingly scratched beyond repair. At $79 a pop, I figured "What the heck, let's see what I can do." After all, I've already bought a replacement, so I have nothing to lose.
I started with a variety of plastic polishing compounds like Plexus and Novus with mixed results. I also tried a couple of products from my local bike shop that were guaranteed to "permanently and invisibly repair scratches in visors and windshields." Again, it's better, but not yet good enough that I can ride without looking through an annoying area that's a constant distraction.
Then I came across this:
Visor Scratch Repair and Prevention
I plan on giving it a try this weekend. I'll let you all know how it works out.
Unfortunately, I don't have any true "before" pictures, but I will take a couple of snaps of what I'm starting with and show the final results.
Anyone else tries this or have any other suggestions? I'm game to try anything on my old visor!