Independent laboratory tests have proven that Nu Finish Car Polish can last for a whole year in standard weather conditions. If you were to wash your car every week for a whole year, water would still bead on your car’s finish after the 52nd car wash. The beading on your car’s paint is a sure sign that your paint is being protected. We recommend that you apply a second coat of Nu Finish Car Polish 30 days after your first application for maximum protection.