Metal Bonding Questions

I use 3m 45 minute set.
It works great especially when you can't get a welder into all the spots. You need lots of clamps.
Test fit the panels a few times and use screws to hold into place. When gluing use the same screws. This aligns the panels.
Once the glue is set the panels will not come apart without destroying the metal
Good luck This is way faster than welding.