Oh man you are a couple of ball busters : ). First off on the primer, I was trying a different brand. Before paint the primer will be all the same so the paint will match. Now the tires......... here is my problem. They are not solid letters. That are a raised outline type and so far I ave not been able to get them right. I have tried with a small brush and even a toothpick. I also tried a white fine line paint pen that also did not work. Can't I just say the white rubbed off the real car and leave it at that ?