We back every job with a 6-month no-yellowing guarantee. If the lens yellows within 180 days, we come back and re-coat it free. In real life, our restorations can hold up for years — but six months is what we put in writing.
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Cheap polish kits don’t actually fix the problem — they buff the existing dead UV layer to a shine, which is gone again within weeks of sun exposure. We strip that layer off and chemically bond a fresh urethane UV clear coat to the bare lens. That bond is why we can guarantee the year. Sun, weather, and washes still wear it eventually — but the curve is much, much flatter.