I have a feeling the roof was caved in and it sat for a while outside. Most of that brown on the roof is actually some kind of coating, there wasn't any actual surface rust on it, just pre existing pitting. Almost wonder if it was rolled and that's a replacement roof that warped badly when the apprentice put it in. The spotty patches appear to be torch marks from attempted shrinking. Fortunately the left side has a more intact roof line and there's no bog over the windscreen and rear window tops so I have some edges to work to

I guess the 5 gal tin of Bondi was on special that week

Trying to limit my work to the roof and A pillars, I'd like to frame off and fully strip it, but I also want to drive it this decade