When preparing for the installation of replacement body panels, which technician is correct?

Using a disc sander on flanges is a suitable and effective method for preparing for the installation of replacement body panels. Disc sanders can provide a smooth and controlled surface, which is essential for creating a good bond between the new panel and the vehicle. This method allows for the removal of rust, paint, or other contaminants that could interfere with the adhesion of the panel.

The advantage of a disc sander is that it can flatten out the flange and allow for a precise fit of the replacement part, ensuring that the new panel aligns correctly with the existing structure. Proper preparation in this way helps to enhance the integrity and durability of the repair work.

In contrast, while a grinding wheel may also be used for similar purposes, it typically removes material more aggressively and can lead to uneven surfaces or excessive heat buildup, which can warp the metal. This makes the use of a grinding wheel less ideal for preparing flanges specifically, as it can result in a surface that isn’t conducive to a clean and secure installation of the body panel.