I have found that to work good,,, the sharpy. But if like me. having Vetts and Z28s with soft aluminum, I took out an extended warranty on the car and one on the wheels and tires. I have used it many of times and the dealership hates to hear that one. In a hurry or ina pinch the Sharpy works good, touch up paint worked better but the replacement of the wheels works better. I will take out another on the next car.