Tailgate lower seam construction

[chalkywoods]

The bottom couple of inches of my tailgate is rusted to death so I've chopped it.
eg:


I'm making the new panels myself. The outer skin is wrapped round the inner skin at the edges, giving you 3 layers of metal, but I can't work out how they are attached together. There's no sign of spot welds or anything.



Can anyone give me a pointer on how they are fixed? Seems like a perfect spot for water to get in between if it's not done well

Thanks!

[multisi]

Just pressed over like the rear edge of the outer A post panel.

[cobblers]

Yep, you're right - Just folded tight over with a smear of sealer on the outside and a quick spunk of cavity wax on the inside, sometimes.
That's why the rust like they do.

[chalkywoods]

Thanks, I thought that could be the case. My fold doesn't lie as flat as the factory one so I'd have gaps. I'm tempted to put a small weld along that edge but is that asking for a load of warp?