[yumraj]

Since this is polycarbonate can’t it be just buffed, like the car headlight cleaning products do, using a very fine sandpaper?

It’ll just take a thin layer off and can then be polished.

It should cost less than replacing, I think..

[jandrese]

Reading the article it sounded like this was a job for those ceramic coatings they sell to fix this same problem on car headlights. It will be a lot of hours of buffing and applying coats of sealant to fix this, but compared to the cost of replacing the windows it seems like a bargain.