We are seeking volunteers with expertise in German armor colors to evaluate several formulations we have developed for Dunkelgelb - Dark Yellow (8 variations) and Rotbrun - Red Brown (2 variations). These are WWII armor colors. From our research and input from modelers responding to threads on this and other forums there appears to be 4 distinct Dark Yellow variations for German armor, depending on year and manufacturing plant and 1 or 2 variations for the Red Brown color. We will send 1/2 oz. of each formulation with each bottle clearly marked with laboratory code (that is 10 sample bottles