Oilcanned patch panel

Boy, some of you pro-body guys will get a big laugh out of this one. I brazed on a lower-outer door skin today and it oilcanned on me and stayed that way. I did keep the heat low and switched back and forth, left side-right side to keep the heat from building up in one section but it warped like alfalfa's cowlic on a overslept humid day! :CRY: What would be best, 1. heat the whole section slowly and clamp corners before cool 2. heat & hammer 3. dynamite? ( its a Fard ) ha 4. put a Shevy door on? Seriously though, I don't know, its awlful. And please, oxy-acetelene is all I have, can't afford MIG right now, we have 5 granddaughters and grandma insists on paying their way through..........' TOYS-R-US '. Seriously, I think heating the whole panel and hammer forming if I have to hammer, but I hope one of you experienced guys have some suggestions, help,help,help.:confused:

What you need to do is shrink the metal .
take your torch and make a small flame and heat and area to cherry red to a size of a dime , and cool it quick with a watered down rag , this will shrink and tighten the metal , you will need to lightly hammer and dolly to help bring the metal straight, as the metal may swell or suck in .
You may have to do this several times in different areas to get the metal to stop the tin canning .

This should work .

SprayTech

Good advice, shrinking in the manner discribed start in the center or lowest spot and work your way out in a circular pattern. you will still need to do some extra filling. It has been a long time since I blazed anything, good luck.

shevy,
you might also check on a product called Form-a-Shield , its a heat barrier jell ( Non-Toxic ) that you spray around an area you are going to weld to help stop warping .
Its made by Steiner Industries .

Your local paint jobber may carry it , or could order it for you .

SprayTech