If it's the metal strapping part of the handle and the spot welds are coming loose, the rivets work like a charm. Duke turned me on to the rivets. Here's my 26 chief... The handle is tighter now than when it was welded. And these 26 lids are heavy...
3/16" rivets with a backer plate
Under the hood...
I used a Stanley rivet gun, there is also an Ace hardware brand gun. I have riveted a couple handles and most recently a broken socket on a redhead... Same size rivets..
These rivets can be painted to match, I just haven't painted these yet.