PRESTO! CGR™ is based on PRESTO! PRO™. PRESTO! CGR™ is specially modified to work on plastics beyond just automotive paints. In addition to all of the properties of PRO™, CGR™ is designed to stop fiberglass and gelcoat oxidation (that annoying white residue) as well as work on almost ALL other plastics. While we originally stood behind GCR™ for 5 years, our customers are reporting this is more a permanent solution to the oxidation and other plastic fading problems.