The car had been parked outside for an year since it's new, and it has been moved into a garage for 4 month until now.
I believe the spots are from times when the car was parked outside, and I would say it's about 10 months ago.
The are less likely from bird drops, since I cleaned bird drops if...
I found three gray spots on my hood.
Tried soap, wax, 92% alcohol, and fingernails, and none removes them. Their surface texture feels smooth, but not as slippery as the clear coat.
Any idea how to remove them?