Headlight protection advice

[JaxGtc]

I hate to see headlight lenses age and get cloudy and yellow. Anyone have ideas on protecting the plastic? I notice Xpel has PPF for the headlights and I see ceramic coatings. What is the best ounce of prevention?
Paint Protection Film Pre-Cut Kits (xpel.com)
Amazon.com: 3M Quick Headlight Clear Coat, Cleans and Prevents Lens Yellowing : Automotive

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[WuNgUn]

Ford's plastics are better than the average Japanese headlight plastic...
If they dull or discolour, I machine polish them. Never had to do a Ford headlight