What should be the first step in straightening a dent from the back of a fender?

The first step in straightening a dent from the back of a fender is to hit the center with a dolly. This process utilizes the dolly as a stable backing tool, allowing for controlled force applied directly to the affected area of the metal. By focusing on the center of the dent, you help to push the metal back to its original shape, taking advantage of the material's malleability. This method is fundamental in dent repair as it allows for better control and minimizes additional damage to the surrounding area.

Starting with the dolly ensures that as the dent lifts, the surrounding metal is gradually smoothed out, creating a more even finish. Once the center has been adequately addressed, other techniques such as using slapping spoons, applying heat, or pulling may come into play for refining the shape or handling more complex dents.