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"paint" Used Prior To Welding.


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#1 GTTinkerer OFFLINE  

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Posted September 03, 2014 - 05:49 AM

Just wondering if anyone has used the rattle can product that is applied before welding that is supposed to help keep the rust from forming?  And if so how did it work?

 

This is one of the brands I am looking at.  http://www.amazon.co...I/dp/B0015PG4E0

 

Seems like it would be useful for a repair where you can't get to the backside of to prime and paint after the weld.

 

Thanks,


Edited by GTTinkerer, September 03, 2014 - 05:56 AM.


#2 JDBrian OFFLINE  

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Posted September 03, 2014 - 06:50 AM

Good question. I just finished repairing a repair to a JD fender deck. A patch had been welded onto the bottom of the foot pad area and the weld job was not tight. It rusted through from the inside. The key of course would be to have an air tight weld, but any protection that could be added would be a big bonus. 


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#3 HDWildBill ONLINE  

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Posted September 03, 2014 - 09:00 AM

I haven't used it but I have seen it used on a couple of shows I watch where they do repairs.  They weren't promoting a specific product because all they said as they described what they were doing was welding paint. He was repairing a car frame. 


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#4 Cvans ONLINE  

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Posted September 03, 2014 - 09:47 AM

Bill I have never used that particular product. Over 20 years ago I did spray welds with CRC Cold Galvanizing and there is still no rust on them after being outside all this time. Used it as a primer also. 

$_35.JPG


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#5 LilysDad OFFLINE  

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Posted September 03, 2014 - 01:32 PM

This might be a good time to remind folks not to spray your metal with brake cleaner prior to welding. Some folks use brake/carb cleaner as a degreaser just before welding. The chemical when heated is lethal to breath.


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#6 FrozenInTime OFFLINE  

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Posted September 03, 2014 - 03:54 PM

This might be a good time to remind folks not to spray your metal with brake cleaner prior to welding. Some folks use brake/carb cleaner as a degreaser just before welding. The chemical when heated is lethal to breath.

 

Thanks for the info!  I'm just starting out welding, mostly self teaching and what I can remember from welding class in H.S. some.... 4 decades past.  (man, I feel old saying that)



#7 GTTinkerer OFFLINE  

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Posted September 03, 2014 - 04:45 PM

I was thinking of using the weld through primer when replacing cab corners and sill plates up here in the Frozen North where tons of salt are used during our 6 to 7 month winter season.  I have seen a bunch of repairs that failed along the welding seams, either bleeding through the paint or popping out the Bondo filler..

 

Thanks for the replies.


Edited by GTTinkerer, September 03, 2014 - 04:45 PM.

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#8 LilysDad OFFLINE  

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Posted September 03, 2014 - 05:38 PM

   I have seen a bunch of repairs that failed along the welding seams, either bleeding through the paint or popping out the Bondo filler..

 

Thanks for the replies.

That's why the pros are using adhesives to bond auto panels now. Yeah, cars are 'glued' together.


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#9 petrj6 ONLINE  

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Posted September 03, 2014 - 05:43 PM

  Save your money and get a can of rustoleum primer, spray It on there and go about your day.  Keep in mind that most primers absorb moisture,  if you spray primer on metal and don't cover it up with a finish coat it will still rust away to nothing in no time at all, you need a good sealer to prevent rust.

   I use cheap primer all the time on the inside of stuff I weld up and have had good luck with it, seems to work well and keeps the rust down a little but it will not prevent rust altogether.

                                     Pete


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#10 alec OFFLINE  

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Posted September 07, 2014 - 12:53 PM

weld through primer works great . thats why bodyshops use it all the time . if you can get primer and paint on the the backside its a plus but thats why they use it ....because they cant . ( I am a Icar certified automotive painter  )


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#11 FrozenInTime OFFLINE  

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Posted September 07, 2014 - 04:25 PM

I just picked up some rustoleum rusty metal primer, hope that works good.


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