I have been hesitant to post on this subject most claim 2024 T-3 can't be welded.
Most of the aircraft engine cowlings and engine nacelles were "welded" during WWII. Some call it welding, some refer to the process as brazing. Over the last 70 years this has become a lost art.
There is a company trying to retain/relearn the skills of old.TM Tech. The owner is Kent White every year he holds seminars at the annual EAA Airventure.
Go to TM Tech's web site and look around. On the web site there is a section where you can ask Kent a question, send him your pics and info. It my take a day or so before he can get you a response but he will be patient.
As far as I know he is the go to guy, he can tell you how to weld your piece, he can also tell you how to make a new section. I have seen this guy take a CRUSHED aircraft spinner and in a hour or so the spinner was ready for polish or paint. He even teaches classes at his shop on metal shaping.