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Painting question

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Old 04-28-2018, 08:22 AM
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Here's the scenario, I will be cutting my car frame and adding a few inches of metal and then adding plates for reinforcement. My question is the what should the backside of the metal being welded be painted to prevent rust ? Is epoxy primer enough ? I know I need clean metal to weld to just concerned about what I can't paint after the welding. Thank for any input.
 
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Old 04-28-2018, 09:38 AM
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I've used the POR15 system on some things. Properly applied, that stuff does one heck of a job! And what I mean by properly applied, either applied to pourse metal (like something that was just sand blasted) or using their metal prep spray and it has a great bond to the metal.
 
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Old 04-28-2018, 10:24 AM
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I'm looking at nice shiny new metal not pourse. I'll check out that brand. Just hoping for something that will stick too and seal that side , I know some will be ruined from welding heat but anything is better than nothing.
 
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Old 04-28-2018, 04:19 PM
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As you mentioned, whatever is at the weld bead is going to get cooked off anyways. Maybe a weld through primer would hold up closer to the weld?
 
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Old 04-29-2018, 07:01 AM
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I haven't heard of this kind of paint before is there a brand you can recommend ?
 
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Old 04-29-2018, 11:34 AM
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The only kind I've ever tried is the Eastwood brand.

I'm not even entirely sure it would help though, but it does hold up well right next to welded areas.
 
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Old 04-29-2018, 08:17 PM
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POR15 can be used on smooth/shiny metal, but would require the metal prep. But it would have to be done after welding (properly applied, it is near impossible to remove.
 

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