Quote:
Originally Posted by LeeH
I've seen that video before. At the end he basically says it didn't work and, if it had, once it gets hot the dent will probably come back.
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There are two parallel surfaces: steel and paint.
1). Paint is a hardened chemical.
It need to be warmed up to return to a flexible, and workable state. Age might affect this.
2). Steel is a metal.
It likes to return to its existing status (memory).
PDR done wrong "oilcans" and thins/softens the edges, weakening the surface and makes pushing the center of the dent back more difficult without backing.
Never tried the technique personally, but dry ice should theoretically shrink the steel molecules when applied
backside directly to metal.
Warm the exterior paint to make it flexible.
Once the dent pops out:
HOLD IN PLACE with very slight outward pressure for minutes, while lightly slapping the surrounding panel.
The metal has been newly aligned/reset and needs to be reset.