Warranty Information NitroPlate guarantees our coating against rust through on new parts when the entire surface of the part is coated with NitroPlate. If the metal under our coating rusts through,  NitroPlate will recoat the part at no cost. 3 Year Guarantee If you are unhappy with NitroPlate's coating within 3 years of orginal purchase date we will recoat you part for free.