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post #1 of (permalink) Old 01-24-2004, 02:28 PM Thread Starter
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Welds, preventing rust, Body work questions

I know I asked this before but I cannot locate it..

What are the surface coatings out there that you can spray on before welding that prevents rust like where the panels are welded together.

One was made by 3m

Also is fiberglass body filler better than bondo for small inperfections?

When mating one pannel to annother is it proper to put the spot weld on the inside or outside??

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post #2 of (permalink) Old 01-24-2004, 02:48 PM
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Re: Welds, preventing rust, Body work questions

</font><blockquote><font class="small">In reply to:</font><hr />
When mating one panel to another is it proper to put the spot weld on the inside or outside??

[/ QUOTE ]1. I don't have a spot welder,
2. I rivet weld,
3. And put the rivet on the inside,
4. Where it won't show,
5. Then grind down the rivet weld.
6. For the welding product Go Here.
7. I've not seen a problem with Bondo,
8. It's improved over the years.
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post #3 of (permalink) Old 01-24-2004, 03:30 PM Thread Starter
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Re: Welds, preventing rust, Body work questions

Thanks LEVE I could not remember the name of it.

As for the welds, I have a mig welder too, No spotwelder.. as for the welds It is just a bear to get to the pannels on the back side in certian spots. I will do as manny inside as I can but some will have to be done from the outside.
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post #4 of (permalink) Old 01-24-2004, 08:27 PM
 
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Re: Welds, preventing rust, Body work questions

</font><blockquote><font class="small">In reply to:</font><hr />
What are the surface coatings out there that you can spray on before welding that prevents rust like where the panels are welded together.
One was made by 3m


[/ QUOTE ]

"Weld-Thru"

[img]images/graemlins/beach.gif[/img]
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post #5 of (permalink) Old 01-24-2004, 08:30 PM
 
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Re: Welds, preventing rust, Body work questions

Oops,,,,,,,,,maybe I should read the thread frist,,,,,,,,,,,,,,, [img]images/graemlins/deal.gif[/img]

[img]images/graemlins/beach.gif[/img]
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post #6 of (permalink) Old 01-24-2004, 10:47 PM
 
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Re: Welds, preventing rust, Body work questions

You could always use shavehead blind rivets for the spots you can't get to to plug weld...they are like normal blind rivets but designed so you can shave the head so the rivet is flush/smooth eh.
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post #7 of (permalink) Old 01-24-2004, 11:44 PM
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Re: Welds, preventing rust, Body work questions

First I have to admit that I don't weld or have a welder. Moving on from that fact (clueless on the subject) is there a good source for body work welding? Do's and Don'ts, type of equipment that works for light (rusty) sheet metal work. My Scrambler really wants to know how to fix some of those nasty holes.
In short where can an old fart learn new trix and start doing some serious body work? I'm sure it will require welding.

Oh.... Don't want to steal the thread.. but....

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post #8 of (permalink) Old 01-25-2004, 01:44 AM
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Re: Welds, preventing rust, Body work questions

If you want to fill small imperfections, use glazing compound. It's consitency is fine enough to fill without building up and dries smoother than bondo. Hope that helps some. [img]images/graemlins/burnout.gif[/img]
post #9 of (permalink) Old 01-25-2004, 08:25 AM
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Re: Welds, preventing rust, Body work questions

If it's sheet metal you want to weld, get a spot welder. I borrowed a buddy's Panel Spotter (tm) and was amazed at how well it worked. No burn-through, no warping, quick, no brains. It had two heavy leads with a pistol grip on each. You just press the tips of both guns onto the panel and pull the trigger in one. The machine says "UNGH" and two spots are done. The only adjustment is the timer on the machine - longer for thicker sheet.

It's not welding like 4130 with a TIG, or putting a 'row of dimes' on heavy plate with 7018s, but it can't be beat by any other process I've seen on sheet metal.

The only downside is that you leave a potential entry point for air and moisture between the sheets, but there aren't very many people in the world who can make a gas-tight lap-weld of two pieces of sheet with any common method.

The only alternative I'd consider would be brazing. If you're good, you can do perfect, gas-tight joints on sheet metal, but you've got to be GOOD.
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post #10 of (permalink) Old 01-25-2004, 08:33 AM
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Re: Welds, preventing rust, Body work questions

</font><blockquote><font class="small">In reply to:</font><hr />

The only alternative I'd consider would be brazing. If you're good, you can do perfect, gas-tight joints on sheet metal, but you've got to be GOOD.

[/ QUOTE ]

Brazing, now thats something i havent heard said in a long time. But you still keep rust from that, from the rosin or acid (whatever its called).

There really is no way to stop rust from forming between two pieces of metal that overlap. Some ways work better then others, but unless the vechile sits in a climate controlled garage and never gets wet when driven, rust will form between the two pieces, just from moisture.

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