Help with very bad water spots...

[DWill]

Okay, I live in San Diego (Ramona actually) and was evacuated because of the fires here. On the way out of my house my car was covered in ash of course.

Long story short, I went to Palm Springs and the first night there I parked my car in the hotel lot and didn't notice that I had parked where the sprinklers would hit.

You guessed, not only water spots, but very, very bad water spots from the water and ash drying on my car.

Tried to get them off with clay, no luck.
So, short of having my car rubbed or calling a proffesional detailer (which I will do if I have to) is there anything anyone can suggest that I may be able to do to get the spots off myself????

Thanks....