Can you weld pot metal ?

[DRJDVM's '69]

On my '70 Barracuda the rear tailights have separate bezels that slide in from the outside of the tailpan and then the taillight assembly attaches to the bezel from the inside. What I wanted to do is permamently mount the bezels and smooth them to the tailpan so there is no seam there anymore. The bezels are potmetal.

Is it possible to weld the potmetal to the sheetmetal ??

My other idea was to adhesive bond the bezel in place and then use Metal to Metal or Kitty Hair to fill the seam. I'm worried that over time the seam will flex and the paint will crack etc.