Is there a way to make my sunglasses scratch-resistant?

BrainStuff

English - December 06, 2010 20:13 - 3 minutes - 2.87 MB - ★★★★ - 1.6K ratings
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Sunglasses have various special coatings: Some are reflective, while others are scratch-resistant. In this episode, Marshall explains how these different coatings work.

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