Does headlight polishing have any impact?
2 Answers
Yes, polishing will grind away the protective layer on the headlight surface. Here are the detailed consequences and considerations: Consequences of Polishing: After polishing, wax is applied, but the wax components on the headlight surface are prone to wear off. Without the protective layer, the headlight surface oxidizes, reducing light transmittance. Repeated polishing will thin the headlight cover, leading to cracks. Considerations: Over time, car headlights are prone to aging, developing fine cracks and minor scratches. If these do not affect the lighting effect, polishing is unnecessary. If there are numerous scratches or severe damage, polishing is not recommended—replacement is a better option. While the entire headlight assembly is expensive, the cover is relatively cheap. If the cover has aged and turned yellow, replacement is advised.
I used to help friends with headlight polishing and found it quite effective. Polishing removes surface yellowing and scratches, instantly making the lights brighter, especially improving visibility during night driving and enhancing safety. However, there are downsides; using too much force or rough tools might wear off the UV protective layer, causing the lens to age faster, requiring more frequent treatment or replacement within two to three years. It's recommended to use a dedicated headlight polishing kit that includes cleaning and sealing steps, avoiding the shortcut of using household abrasives. From my experience, a light polish every six months or as needed, along with regular lens cleaning during car washes, can delay aging and extend overall lifespan. Applying a UV protective spray after polishing is a smarter move—don’t overlook the details.
