a novel car wash composition that significantly reduces water spotting , redeposition of soil , and inhibits the formation of hard water scale . the novel car wash composition is comprised of : a substantive polymer to render the painted surface of the car more hydrophilic , a surfactant package containing a mixture of anionic and non - ionic surfactants selected to optimize the benefits of the substantive polymer , and various fragrances , dyes , and biocides commonly found in car wash compositions .