Welcome. Ask as many dumb questions as you like.........
Well worth a bit of paint and sealant on that drain channel at the back of the roof - they are a pain to repair so best to preserve them as well as possible.
Hey, guess what? That's actually the worst part on the car! Around the gutter/roof join at the back is rotten. The roof will be easy enough to weld, but I was wondering what to do with the gutter? Any ideas? BTW, I'll copy and paste this into a relevant section.