Hi, Ive been using Megs Headlight protectant on my customers cars for the past month or so. Yesterday a customer came back for a wash and i noticed her headlights were starting to yellow again? Its been about 1 month since we did her headlights. Our process is 800/1500/2000, polish out with D300, 70% Ipa wipedown, then Megs headlight sealant.
What could be the issue? Does the UV protection in the product not last 1 month?
What could be the issue? Does the UV protection in the product not last 1 month?

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