[Psychlone]

Ok...here's the scenario.
I park at a store waay back in the back of the lot so that I can admire my truck all the way there and all the way back to it (aside from the obvious 'don't want anything to hit it' reasons)
While I'm in the store (about 2 hours) the sprinkler systems turned on and sprayed water down the driver's side (backed into a corner, lawn and flowers/etc. down that same side and behind my truck)

Ok, so the water is harder than anything I've ever seen. I live in a small town, and our water hardness is medium (about 174ppm total dissolved solids - yep, I actually test water cause I wanna see what I'm drinking!)
There must have been some contamination or something wrong with the water at this place, 'cause these spots can't be removed with:

1) Soap and water
2) Detergent and water
3) Turtle Wax Clear-Coat Polish (and swirl remover w/ automatic buffer)
4) Good 'ol Rubbing Compound (by hand & with auto buffer)
5) Meguire's Clay Bar (with detailing *and* cleaner wax)
6) LIME AWAY (yep...out of frustration, I actually used Lime Away, which actually helped quite a bit, but not enough, and I certainly don't dare use more without some sort of consensus on if it's safe or not!
7) Turtle wax ICE (on this last round I actually used an automatic buffer)

THEY'RE STILL THERE!!!!!! (yep...I went over my ENTIRE truck 9 times...the passenger side is a mirror...the driver's side is like a mirror WITH SPOTS ON IT!!!! Arrrrrggggggggggg!

Ok, just short of Muriatic acid, what can I get these spots off with? I'm just about to go use some distilled vinegar on my windshield...it's so hard to see through because of the water spots, I'm going NUTZZ!!

Ideas? (I mean besides a shooting rampage in the manager's office at the store)

Thanks for any input!

Psychlone