10 With the old quarter-panel and drop off removed from the car it's time to start cleaning up all the edges in preparation for the new panels. Depending on how close you got with the initial cuts, this will either be easy or time consuming. Chances are you will need to use a combination of grinding and cutting wheels. If you're going to do this yourself, be sure to budget in a realistic amount of cash for grinding and cutting supplies. They're not cheap and you can go through a stack in a surprisingly short amount of time.