Features a cross-hatched or serrated face designed to gather and shrink stretched metal.
What are you currently trying to repair?
The exact point where the damaging force occurred, creating a low spot or valley.
: Procedures for filing and sanding to create a perfectly straight surface ready for paint. Where to Find the Manual The Key to Metal Bumping: Sargent, Frank T. - Amazon.com Features a cross-hatched or serrated face designed to
Modern collision repair data is available in free PDF resources:
When a vehicle panel suffers damage, the metal does not just bend; it displaces. Energy travels through the panel, creating a primary dent surrounded by areas of tension called ridges or crowns. Metal bumping reverses this kinetic energy to unlock the damage without thinning or cracking the metal. 2. Core Tools of the Trade
Never hammer a low spot without a dolly behind it. Rule 2: High spots get hammered down directly; lows get pulled or tapped from behind. Rule 3: If you hear a “tick” instead of a “thud,” you’re stretching metal. Rule 4: A crowned panel should rock on a flat surface — if not, find the hidden high spot. Rule 5: Finish with a whacker (soft face hammer) and spoon to smooth ripples. : Procedures for filing and sanding to create
A flat, paddle-like tool used instead of a hammer to distribute force over a larger surface area, minimizing metal stretching.
These handheld anvils serve as the backup to the hammer:
: This method creates micro-ridges, localized stretching, and unnecessary V-channels. Energy travels through the panel, creating a primary
and stretching shrunk metal back to its original plane. Hammer-Off-Dolly
Features a pointed tip on one end used for raising small, isolated low spots from the backside of the panel.
The buckled and distorted metal surrounding the impact area, often reaching feet away . Ridges: Peaks formed by the bending of the metal .