Indeed, I have performed wet sanding on the lenses multiple times throughout the years and have applied different anti-UV light coatings (I will attempt the Amazon-recommended one mentioned above) without achieving a long-lasting outcome. However, markjay's point is worth considering: it would be preferable to have polycarbonate lenses that can be replaced individually rather than replacing the entire unit. The right to repair movement, now gaining traction in the United States, advocates for the adoption of products that are designed with modularity and accessibility in mind, as opposed to the deliberate incorporation of planned obsolescence, which is prevalent in some companies such as Apple and others.