Cleaned up front headlights to like new. Had a can of very old garage find Simonize carnuba paste wax and Turtle Wax Seal and Shine sealant. Put the Simonize on one lamp, and the TSS on the other to protect the lights and as a comparison of durability. After about 1 month, was surprised to see the carnuba side was definitely clearer. IMO the carnuba resisted UV better than the new stuff. Just one experiment but perhaps the modern, now much easier to apply, carnuba waxes are more protective than cheap sealants? Project Farm (and others) compared popular sealants but never included carnuba in their testing.