I have a video showing how to restore light with the (uv?) coating flaking off but haven't had a chance to finish it yet.
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detailgod &
jesselyons2002 said you are going to need to wetsand then polish to restore them. They are past the point of polish restoration.
Here are pics of the lights I restored:
Before:
After 1000 & 3000 grit wetsanding:
After polishing with rotary (1500rpm/1200rpm)Menzerna SIP & 106FF and 4" LC pads:
Make sure to apply a good sealant regularly after restoring them to prevent discoloration in the future.