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Re: 1/4 panel stretched how to fix
[Re: 540challenger]
#2509065
06/15/18 07:30 PM
06/15/18 07:30 PM
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Joined: Jan 2003
Posts: 1,255 Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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A old timer mentor of mine called it "oil canning" from back in the days when they had the little oil cans with the disc on the bottom that mived back and forth. Seems that term is mostly applied to metal roofing now.
Torch method goes like this, use your hand to pop it back and forth a few times until you think you know where the center of the stretched metal is. Heat that spot until it is cherry red and place a rag soaked in ice water on the spot. The fast cooling will draw/shrink the metal in. Feel around and see if there is a new or multiple new centers of the oil canning effect and repeated until the panel no longer pops back and forth.
Shrinking hammer method uses a hammer with a sharp spiral pattern on a head that rotates slightly with impact. The sharp spiral grabs the metal and the rotating head twists the spiral inward pulling the metal along with it a tiny bit at a time. You need access to the back of the panel with enough room to hold a dolley for this method.
Seems he showed me another method using the pick end of a hammer and thick leather over a dolley to punch in little divots to take up the warpage, which repair filler and smoothing to cocer up later. Also need access behind the panel. Don't quote me on this method.
Come to think of it, don't quote me on any of this. It was probably 15 years ago he showed me this stuff. But hopefully this will give you some info and ideas on options to further research.
"The happiness of your life depends upon the quality of your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: 1/4 panel stretched how to fix
[Re: 5carguy]
#2509164
06/15/18 11:25 PM
06/15/18 11:25 PM
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Joined: Jan 2003
Posts: 1,255 Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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I think if you have never done this before the shrinking disc is the answer. I'm not too familiar with the shrinking disc. From the video I checked out though it looked like it was more suited for generating the necessary heat on small bumps. Something like quarter panel stretch from blasting is more likely to be spread across the whole panel, where it looks flat and a large section with no obvious bump to focus the disc's work on. To each their own though, worth a shot. Let us know how it goes.
"The happiness of your life depends upon the quality of your thoughts" ~ Roman Emperor Marcus Aurelius
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