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Fire damage fender repair

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GlenIdaho

02-14-2007 20:17:15




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I have two 800 fenders that went through a garage fire. The metal between the two uprights of the bracket appear to have been distorted by the heat. Is there a way to shrink the metal back into shape? Thanks in advance.




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B-maniac

02-15-2007 14:38:11




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 Re: Fire damage fender repair in reply to GlenIdaho, 02-14-2007 20:17:15  
Metal only needs "shrunk" when it has been stretched as in the case of being hit. The fire has already shrunk it , that's what caused the distortion. Hammer and dolly it as flat as possible and fill the imperfections with plastic. Prime/surfacer, block sand,prime again until smooth to paint.(make sure the metal is perfectly clean first)



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Joe(TX)

02-17-2007 03:13:51




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 Re: Fire damage fender repair in reply to B-maniac, 02-15-2007 14:38:11  
I have to disagree with the statment that the fire already shrunk the metal. It is distorted and stretched. I have repaired several partialy burned car hood and have always had to shrink the metal. If you don't try to shrink it, you will have a lot more filler than metal.
A good shrinking dolly is usful here.



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B-maniac

02-17-2007 18:24:46




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 Re: Fire damage fender repair in reply to Joe(TX), 02-17-2007 03:13:51  
The reason you always had to shrink the metal was because when you hammered out the warps to try to flatten the panel back out , you stretched the metal. Anyway , no one told him how to shrink metal so I will just in case he stretches it when bumping it flat. Take an acetylene torch with a cutting tip adjusted down as fine as you can get it. Heat an area the size of a quarter as quickly as possible to dull red and immediatly cool it with a water hose until you can lay your finger on it. Do this 2 or three times within the lowest area of the stretch. You will be able to see it pull or shrink and get tight and you won't have the "oil can" affect and then continue to flatten it back out. There's no limit to the amount of times you do this so if you stretch it some more you can shrink it again. Works a lot better and quicker than shrinking hammers.

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ORS

02-15-2007 15:39:59




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 Re: Fire damage fender repair in reply to B-maniac, 02-15-2007 14:38:11  
There you go B couldnt have said better myself. I may add as always take your time, we are all perfectionist but to our own standards so when you say good enough give it two more hours and you will have it



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Rustyj14

02-15-2007 12:03:40




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 Re: Fire damage fender repair in reply to GlenIdaho, 02-14-2007 20:17:15  
Best thing to do is take the fenders to a reputable auto body shop, and have then do it, or tell you how to do it. Hard to say with not seeing them. If the brackets can be removed from the fenders, the metal can be shrunken back to an approximate shape, then filled with Bondo. Or body lead. (More expensive, but lasts longer.) Warning-some auto body shops are "parts replacers", not tru Body men, as in the olden days! But, there are folks out there who can and will do a good job for you.

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