Another weld through primer thread

Thanks, I was not sure on this.

So, anyone know if the epoxy burns off around the welds? Not in the weld, I know you scuff off the epoxy in the spot you wanna weld, interested in knowing if the epoxy lifts around the weld?
 
I did a ton of research on this topic as well and chose to go the epoxy route. Based mainly upon the input provided by Robert in one of his many fine threads all over the interwebs...

I was very happy with the results. If you let it cure for at least a couple of days if not a week before welding the parts together it holds up mighty fine. If my welding skills didn't suck so bad it probably would have been even better. If you look at the picture below you might be able to get a sense of how well it holds up. Now there is no way to tell the effect it has on the adherence of the primer after welding, but I will say that when I cleaned this up, sanded and prepped it for more epoxy what was there didn't just flake off or peal in any way whatsoever.

Once I am done with the entire rocker and everything is all sealed up I am going to buy a spray gun and the wands that will allow me to apply Fluid Film to all enclosed areas with seams. The Fluid Film will seep into the seam and hopefully protect those spots left unprotected by my welding....

Hope this helps you make an informed decision....

IMG_4209.JPG
 
As Chris suggested, I epoxy both sides of the flange that will be adjacent (inaccessible) after welding.. For cleaning out the spot weld holes, I take an extra drill bit the same size as I used for the plug welds and flatten the end using a roloc sanding disc, 80 grit or finer..


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Then use the sander to back-face (mimic an end mill) the back side of the cutting edge, leaving about a 1/16 or slightly wider flat surface..


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This will limit the amount of surface area of the flat so it is more effective in cleaning out the epoxy from inside the hole..


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Ignore the color of the epoxy, it should be black...


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Despite the heat from welding, note that there is minimal if any discoloration of the epoxy in the vicinity of the weld. You will see better results the longer the epoxy cures, so if something can sit for a week, great! After welds are all dressed, I'll normally use more epoxy and a paint brush, wiping the brush against the edge of the flange to wick the paint between the two panels. When it runs out the other side , it should be sealed well. ;)
 
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The pics speek volumes. Awesome stuff. Thanks for taking the time to explain!!:)
 
The recommendations from OEMs are in regards to work performed after vehicles leave the factory, in repair environments where protective coatings get damaged or removed.
 
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