I know it's been said loads of times on cliosport.net but I can't not post about this. My 172 headlights were an absolute mess when I bought it last year. After spending a lot of time upgrading brakes and generally tidying the car the only thing letting it down was the lights. I couldn't afford new headlights as I'm saving for the cambelt to be changed next month by Diamond Motors. So I purchased a 3M headlight restoration kit based on people's suggestions on here. 45 minutes later the end result was astonishing. I seriously can't recommend this solution enough. I honestly thought my lights were beyond restoration. The restoration kit proved me wrong. Just WOW. So pleased with the end result.