So turns out the water marks might be something worse, like acid damage (guessing from acid rain) :\
I washed and dried the car (inside a garage). Then I clayed the whole car for the first time, which made the paint feel amazing to the touch. Then based on the suggestions I tried using Meguiar's Ultimate Compound by hand, because I don't have an orbital/DA polisher. It didn't make any difference to the state of the paint.
Here is a picture of the roof, which is the only panel that has these marks on it. I found it difficult to capture the defects with a camera, although you can clearly see a faded spot on the lower middle part of the picture.
![[Image: uc?id=0B6N-MKLf5KbTbXIxNHJ4Uy1meVE]](https://drive.google.com/uc?id=0B6N-MKLf5KbTbXIxNHJ4Uy1meVE)
After this I felt really bummed out, so used Meguiar's Ultimate Polish on the car (which I must say is amazing!) and then Carnauba Wax, so that the paint was at least shiny, even if it had these defects.
Next plan is to get a machine polisher and see if it can work to remove the water spots.
I washed and dried the car (inside a garage). Then I clayed the whole car for the first time, which made the paint feel amazing to the touch. Then based on the suggestions I tried using Meguiar's Ultimate Compound by hand, because I don't have an orbital/DA polisher. It didn't make any difference to the state of the paint.
Here is a picture of the roof, which is the only panel that has these marks on it. I found it difficult to capture the defects with a camera, although you can clearly see a faded spot on the lower middle part of the picture.
After this I felt really bummed out, so used Meguiar's Ultimate Polish on the car (which I must say is amazing!) and then Carnauba Wax, so that the paint was at least shiny, even if it had these defects.
Next plan is to get a machine polisher and see if it can work to remove the water spots.