Gtechniq Crystal Serum Light ceramic composite coating the best paint protection Best possible swirl mark and chemical resistance from a prosumer grade product. Provides paint protection with previously un-achievable levels of gloss, durability, scratch and chemical resistance. Compared to standard ceramic coatings, Crystal Serum forms a relatively thick combined film which greatly reduces surface hazing and improves gloss. Considered the thickest, most durable true ceramic coating in the industry. A coating so hard that if applied incorrectly can only be removed by using 1,500 grit sand paper. When applied correctly it can last for up to 5 years.