http://www.audiworld.com/tech/ext43.shtml
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very cool... the last picture compared to the first is impressive
It may not be as easy as the site shows, but for anyone with some paintwork experience, it should be worth a shot!
Where I live, there are companies that weld in a bead then grind and refinish the edge like new.
For those who don't have these companies, this may be your solution!
Great link Chris.