At first I was going to suggest that you cut out the bad parts and patch it with pieces from you spare roof,
until I looked at your other thread, wow that RUSTY.
It will probably be easier to replace the whole roof. There are plenty of threads on here showing the process. It would take you more time to patch all those holes than it would to replace the whole roof as one piece.
If you need inspiration check out the Members restorations thread. There are a few people in there who are taking on bigger projects then this.
Moparclown comes to mind as one of the member who isn’t afraid of a rusty project.