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Q&A > General Tech Advice > Panel repairs > Community Forums > Mustang Forum Australia - Mustang Tech

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xpconnor
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As mentioned in Cruzn's 66 project thread I have a couple of holes in the front section of the rear quarter of my car. This panel on the car is fairly dinged so if I make a complete mess of it it is not the end of the world. My plan of attack was going to be to just weld up the holes with the mig, something I have been practicing on spare sheets of metal. Both sides of the steel in this area have been sandblasted so I am confident all the rust is gone And i am back at clean metal. So is it appropriate to weld the holes up, will the repair last, or am I just asking for trouble in the longer term?





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tim_morrison82
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rust holes are a result of the entire surfae of the panel thining over time, and the worst spots will come through quicker. so the local area is thinner and is russted even though you cannot see it from the outside. you should replace a section of the panel, not just weld up the holes.

you will find your welds will eventually fall out leaving bigger holes...


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IGALOP
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I tend to agree with Tim M. It may be that this panel is now VERY thin and more rust or even just pinholes are a chance to surface quite soonish.


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mikes68
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Don't quite agree there... the welds won't just fall out really and if you spend enough time building it up then it could last you another decade or more easily. Proper preparation is the key and as has been mentioned plenty of times, these old cars were not prepared all that well and were never intended to last more than 5 to 10 years so the fact that they have lasted as long as they have is a testament to the amount of prep that is required to give you another reasonable run. If you are looking to do an economical repair to give you a nice look and understanding that you may need to revisit it in a decade then I say go for it. If possible, get a bit of copper in behind the holes (flush up against the steel) as you fill up the holes with weld. Leaves it much neater on the inside (not that it is seen) and a little easier to prep and seal up with some POR, Integard or whatever your sealer / primer of choice may be.


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soc123_au
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I would plate it, mainly because it would be faster.


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mikes68
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Yeah but what do you know Steve... Poke


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mikes68
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Also, depends on who it is doing the plating :rotfl:


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xpconnor
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soc123_au wrote
I would plate it, mainly because it would be faster.


By plate it do you mean weld a new piece in?


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scott66stang
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I see where Mike is coming from as far as it can be welded up and if it was just one hole i would proberly do it using the piece of copper behind as Mike says.
After a sand blast i had a few smaller than those around the bottom corner where the rear glass seal sits in a fastback, i brazed them up as it was minimal, but a cut out repair would of been very time consuming.
With that repair you have i would chop out an area 10mm extra outside those holes and patch as i agree with Steve it would be easier to do.


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soc123_au
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xpconnor wrote
soc123_au wrote
I would plate it, mainly because it would be faster.


By plate it do you mean weld a new piece in?


Yes. Just cut the old section out & make a template out of some cardboard. Make a patch off the template & weld it in. Going by the pics it is pitted around the holes anyway. Just chop it out & get rid of it.


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ozbilt
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xpconnor wrote
soc123_au wrote
I would plate it, mainly because it would be faster.


By plate it do you mean weld a new piece in?


This shape, but have a fold on the bottom same as the piece you cut out ......



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xpconnor
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Sorry Mike looks like the majority rules and I will have to cut a piece out. Probably a good panel to start on as it has a good ding in it which the PO had just decided to fill with a few cms of bog so if I stuff it up not too much lost. In the photo below you can see the ridge in the lower part at the rear of the panel and in the second photo you can see there were some attempts to fix it by all the tool marks over the surface but then they must of decided bondo was the answer.





Thanks for the advice all I will tackle this part once I have the new floors in. Wink2


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scott66stang
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ozbilt wrote
xpconnor wrote
soc123_au wrote
I would plate it, mainly because it would be faster.


By plate it do you mean weld a new piece in?


This shape, but have a fold on the bottom same as the piece you cut out ......




I prefer this shape, always seems to cover things well Laughing



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ozbilt
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scott66stang wrote

I prefer this shape, always seems to cover things well Laughing



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mikes68
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xpconnor wrote
Sorry Mike looks like the majority rules and I will have to cut a piece out. Probably a good panel to start on as it has a good ding in it which the PO had just decided to fill with a few cms of bog so if I stuff it up not too much lost. In the photo below you can see the ridge in the lower part at the rear of the panel and in the second photo you can see there were some attempts to fix it by all the tool marks over the surface but then they must of decided bondo was the answer.







Thanks for the advice all I will tackle this part once I have the new floors in. Wink2


BAH!! Last time I offer any advice then Poke

Just kiddin of course... It's horses for courses XP. I could go either way with it myself and yeah, the small patch is definitely easy enough although looking at the rest of the skin I would probably replace the whole skin also given the rest of the marks you pointed out as well as that bit of previous rust about 2/3 up and just behind the wheel well.


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Last edited by mikes68 on Tue Apr 16, 2013 10:14 am; edited 1 time in total

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