Another factor that may cause inconsistency in pearl color is the number of paint coats have to equal the rest of the car or different shades are possible. My advise is to watch the video of Ed Hubbs paint the blue mustang. Take note of how the fenders are painted at the same time as the car. Also, do all your primer/sealer painting with bumpers/fenders/car set up in this same exact configuration. This way, you're being repetitive which equals consistency and you get the feel of how each panels configuration flows. If something doesn't jive with you, primer is the time to reposition these for smooth transitions and optimal lighting conditions for when it's time to lay down the money coats. You do not want to worry about moving or touching anything but your gun and the hose behind your back. If you have to struggle with rearranging panels/bumpers/crap when you're painting you run a high risk of dropping/touching/brushing/scraping that object, not to mention you've lost all your focus dealing with paint application. Just do as the saying, "measure twice, cut once" or in this case "practice three times, paint once". I expect some pics from the outcome posted too!