I just read your first post and found the answer to my question...
So something in the air landed on the car.
Have you parked in any industrial areas with any type of smoke stacks emitting any kind of pollution?
Have you parked where a water sprinkler could have went off and sprinkled water on your car?
Do you live in a highly populated area?
Has there been any kind of construction near or around your car where it's parked outside, like at work?
To me, it looks like something has been sprayed into the air and then droplets landed on your car and etched the paint. Could be just about anything...
The answer will be to machine polish or machine compound to remove these paint defects.
You're going to need at a minimum a PC style DA Polisher or you could look for a qualified detailer on this forum in your area to do the project for you.