3M Trizact Glass Restoration Disc (Medium Coarse)

Pink Disc

This works great as a disc prior to the blue disc for those scratches that the blue might take out, but with more time and effort.

A lot of work but the effort pays off

The whole process of working from coarse to fine disc and then polishing takes considerable time, effort and care, following the instructions online. But the end result was worth not having to remove, replace and install a new windscreen with new seals, etc. I'd use the system again if dealing with a hard to get, and/or expensive classic car windscreen.