High-strength steel requires less force and specialized welding techniques (like MIG brazing) to avoid damaging the panel's temper. Conclusion
Mastering metal restoration requires learning two fundamental hammer-and-dolly techniques. Choosing the wrong method for a specific dent can stretch the metal excessively, ruining the panel. 1. Hammer-On-Dolly Technique
If the metal has a loose, drum-like feel, use your induction heater (or torch) to shrink three small dots 1 inch apart. Tap flat with a flat dolly.
If you download the updated panel beating PDF today, these are the five critical lessons you must master. This is . If you download the updated panel beating PDF
Strike the on the top side of the panel with your hammer.
Dollies act as a portable anvil held behind the metal panel. They come in various shapes to match the contours of a vehicle:
By "unlocking" the specific creases (ridges and V-channels) that hold the dent in place, the rest of the panel often returns to its original contour . 2. Key Elements of a Damaged Panel High spots will be shiny
: This method creates micro-ridges, localized stretching, and unnecessary V-channels.
: Procedures for using spoons, picks, and shrinking tools to achieve a smooth surface for painting. TP Tools & Equipment Available Digital and Print Versions
Never strike the center of the dent first. Start by using the hammer-off-dolly technique on the outer ridges to release the tension locking the dent in place. Often, the center will pop back out on its own once the perimeter tension is freed. ruining the panel.
The definitive resource for mastering traditional automotive sheet metal restoration is , a classic auto body repair manual originally published by the Fairmount Tool & Forging Company. Modern technicians and restoration hobbyists frequently search for this text online using variations like "the key to metal bumping panel beating auto body repair biblepdf upd" to find updated, digitized editions of this foundational trade manual. What is "The Key to Metal Bumping"?
Use a body file to identify high and low spots. High spots will be shiny; low spots will remain dull.
Aluminum cannot be stretched; it breaks. It requires special techniques like "pushing" and different heat treatment.