Hi detailing experts

I was unable to wash my car for more than 2 weeks, since the time when Ondoy was about to strike until today. Luckily I wasn't flooded during Ondoy, but when I was washing my car today, I noticed there's a lot of stubborn rough areas in the paint, as if a very sticky adhesive has just been lifted off the paint in some areas, especially upper portions of the car (hood, roof).

I already tried washing thoroughly with Meguiars NXT Car Wash, then re-applied some NXT Wax. I'm still disappointed at the results because the rough areas are still rough while the rest of the paint is already very slick. I even followed up the rough areas with Megs UQD, but nothing.

I suspect it was because of the rain water that stuck onto my paint and was never washed away for weeks, combined with the sticky humidity.

Will claying solve my problem? Or do I need to resort to polishes or some other treatments?

Please help. Thanks in advance.