If you are looking to paint the tail panel black it is NOT dark argent! Dark Argent is a textured silver paint and is most common on the rally wheel center caps in 71, compared to light argent which is the color on the 70 rally wheel center caps. The correct black paint is called organasol which has a texture to it and is rather expensive. There are many routes to go for blacking out the tailpanel if not a correct restoration.