Removes surface contaminants (brake dust, rail dust, paint overspray, tree sap, industrial fallout) not removed by washing or polishing. Makes paint very smooth. Safe on all paint/clears, metals, fiberglass and glass. Made in the USA - superior quality. Will not harden over time. Will not damage the finish. Use with Mist-N-Shine (Part #01214) to lubricate clay properly for the best results without sticking.