Hard water car stains

Hello everybody?

I'm a sailor over here in Naples and I have a question about hard water. What is the best way to remove hard water calcium deposits from a car's finish without damaging a car's finish?

Thanks!

I don't know if you ever solved this riddle, or got any answers... I am a dependent on base, so I spent hours trying to solve this dilemma on my brand-new car and paint job. I worked and searched for a while before trying the old stand-by for calcium deposits: vinegar ⇦in bulk on eBay or Amazon [affil link] , then let it sit on my car's hood (the affected area)to soak for a few minutes, then it all wiped off with little effort. I washed my car and will give it a really good waxing to protect it, and myself from further headaches! Good luck.

Taking the good with the bad in Naples! Go Navy!