Thanks!
I researched the net for hours trying to determine how to get rid of hard water spots.
Distilled white vinegar was suggested, but only if the spots were recent. Since I got my car a year old with 27,000 miles, I guessed the spots were embedded in the surface. That called for a wax with a cleaning agent, and a polish if that didn't work. I decided to do both (polish followed by wax with cleaner).
My arms felt like rubber when I was done. lol