What to Do When the Car Light Cover Turns Yellow?
2 Answers
When the car light cover turns yellow, the only solution is to replace it with a new one. The yellowing of the light cover is not due to oxidation but because the material batch or specification used for the yellowed cover does not meet the requirements for UV resistance. If the cover has turned yellow, there is no way to remove the discoloration; the only option is to replace it with a genuine headlight. The vehicle's lighting must ensure driving safety. The surface of the headlight cover is covered with stripes, which primarily serve to transform the light sources from the bulb coming from different directions into controllable parallel light sources through corresponding angles and refraction. This ensures that the driver's field of vision receives uniform brightness, making it easier to see the entire road and surrounding conditions clearly.
My car headlight covers also turned yellow before, making the lights dim at night. Once in the suburbs, I almost couldn't see the road signs clearly, which really scared me. I first tried cleaning them with toothpaste and a cloth, spending half an hour only to see a slight improvement. Later, I bought a specialized car headlight polishing compound online. Following the instructions, I sanded the surface with sandpaper and then rubbed it repeatedly with polishing paste, which restored about 80-90% of the clarity. A word of caution: don't press too hard when sanding, or you might damage the glass. After polishing, I applied a layer of UV protective wax, and now I maintain them every six months—they haven't yellowed since. If the problem is severe, I recommend getting professional treatment at a repair shop; it saves money but takes time. Prevention is more important: try to avoid parking in direct sunlight, and clean the headlight covers more often when washing the car to keep them clear and safe.
