A little about aluminum body panels

[Flygirl]

—Aluminum is unlike steel in that it doesn’t have a “memory” or “desire” to return to its original shape once it’s damaged. It will want to remain in its damaged state, and it's necessary to apply different techniques to assist it in returning to its original state.

—Aluminum also gets harder or stiffer when it’s damaged and again when it’s straightened. This is called “work hardening."

—Cosmetic exterior panels made from aluminum are generally made from heat-treated aluminum.

—Heat-treated aluminum can range in hardness from a T0 (which is very soft and malleable) to T6 (so hard that when you attempt to bend it, it’ll break). Many outer aluminum body panels are temper T4, which is very strong and dent resistant.

—Heat can also be used to repair dented aluminum panels, but be aware that any adhesive areas in the heat zone will have to be re-bonded at the conclusion of the repair, as well as applying corrosion protection from burned inner surfaces.

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Interesting stuff.


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Also this link to David Kirkham's amazing repair of a badly creased and dented rear fender:

Kirkham Video of Kirkham University Aluminum

Truly amazing!