Why use Gtechniq C1 Crystal Lacquer? C1 has been independently proven in the world's most respected weathering facility. You can see in the YouTube video below that it offers the best gloss retention of any product tested. Over a simulated run of 3 years in Arizona sunlight, a C1-coated panel lost half the amount of gloss as its next-best competitor and a third less gloss than the average score for all products tested. As well as gloss retention, C1 Crystal Lacquer is extremely durable, as it actually becomes the functional surface of a car's paintwork. Also scratch-resistant, C1 forms a crystalline film that is extremely hard - this characteristic makes it effective at preventing minor scratching from poor wash technique on relatively soft automotive paint. C1-coated panels have been tested against uncoated panels, as well as high-end carnauba waxes and polymer sealants. On average, panels coated with Gtechniq C1 exhibited 50% fewer swirl marks than those coated with waxes or left uncoated.