Yes that helps. I appreciate your quick and thorough reply. I will be ordering Headlight Armor for my ST soon. Thanks again.Brandon sorry your Mustang had some issues, but they were not related to an application on the lens. As far as cracking goes, you have heard wrong. Headlights cracking because of an application (anybody’s) is nonsense. A headlight protection kit is not going to cause the polycarbonate / Lexan to fail. What you have heard has nothing at all to do with the headlight protection kit. Polycarbonate & Lexan, what most composite headlights are made from these days, have a continuous working temperature of between 248 - 475 F depending on the formulation, This means that water would boil instantly upon contact and that you would get a nasty burn if you touched them before they reached the failure point. Car makers are not going to design a headlight to run that hot. the materials we use will fail before the polycarbonate would.
Polycarbonate lens failure is usually a manufacturing issue during the production of the polycarbonate, or a chemical contact issue. The latter could have occurred before you even picked up your car from the dealer. There is one dealer here in Dallas who had to replace a lot of headlights when it was discovered that the (outsourced) make ready / wash people were using wheel acid on the entire front of the vehicle to make bug removal easier... There is a long list of chemicals that the polycarbonate lens is susceptible to.
Hope that helps.