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Message: <blockquote data-quote="astroboy" data-source="post: 261378" data-attributes="member: 4527">I have tried spray type rim cleaner on my Perdana headlights, should be the same polycarbonate material. The moment you spray, its shocking to see the liquid that drools off is in brownish shitty color. Those are all the dirt the lens picked up and normal detergent are unable to wash them off during car wash. Let it soak for a couple of minute to let the cleaner work its way through, u may use your finger to gently rub it.Then rinse with water and you will now notice your lens appear hazy. Use Soft99 to polish it a little. Voila! as good as new!Rain-X also I tried before but the rim cleaner is so far best DIY method.The paid service is not cheap, if not mistaken, RM120/pc. They first sand the lens with 300 grain sand paper, then 800 grain sand paper, then they use orbital to polish using polishing compound. Then to complete the job, they spray a layer of clear lacquer over the lens for better protection. That's why its expensive!</blockquote>