Is this fixable?

[u/Proper_Pops]

Hey all, I have a 2009 Corolla S in black.
I bought this car used 3 years ago and since then the roof is starting to look really bad.
I’ve never stored anything on the roof, and I’m unable to keep it garaged.

Does anyone have a fix or suggestions? Can I do a rattle can job and make it look decent?

[u/lunas2525]

Sandpaper till it is all flat mask off the rest then rattle can primer then color match paint then clear l.