Here's a link to one brand. I've read the way to tell if the windshield can be saved or not is to run your fingernail over the scratch. If it can be felt with the fingernail it's too deep to be polished out successfully. The truth is if you're patient enough just about anything can be polished out, but - if the scratch was too deep the finished result will be wavy, which is not too cool for a windshield.

http://www.amazon.com/Eastwood-Polishing-Scratch-Removal-Repair/dp/B0034CLKQ4


1960 GMC 1/2-Ton Pickup Truck
In the Gallery
Updates in the DITY Gallery
Now cruising in the Passing Lane