I did a sedan pro street a few years ago that we painted viper silver then laid out the butt stripe. Took the viper silver put in couple drops of black then put two light dust coats on it. Then cleared the entire car. It just shows up but at times blends in that you can't see it. Customer loved it. I took a scrap piece of metal and colored it in viper silver then tried various ideas with tinting the actual color with blacks & various pearls. Gave them it and let them decide. Wish I had a picture on my phone I could up load. Maybe I'll try from wife's computer tomorrow. Just an idea for you.