When you overwork a dent, the metal gets loose (oil-canning). The key step from the updated bible:
The manual serves as a guide for selecting and using the right specialized hand tools Dolly Blocks : Heavy metal blocks used behind the panel to support it When you overwork a dent, the metal gets loose (oil-canning)
“A true metal bumper doesn’t hide damage – he undoes it.” When you overwork a dent
The Key to Metal Bumping , often called the "Bible" of auto body repair, was written by Frank T. Sargent was written by Frank T. Sargent