Spray from road ice mitigation
 

Seems the "Ask a Detailer" sticky is behind the times.

I got some sort of spray from following to closely. The roads had been sprayed with de-icer yesterday.
Today there were indelible white spots all over the windshield that the washer and wiper wouldn't budge.
When I got home, I tried water, Fantastic cleaner, Windex and even Rain-X.
Nothing would move the spots until I tried straight white vinegar.
That did the job for the windshield, but I'm wondering about about the paint on my '13 FRS Whiteout.
Can't see it right now, but I know it's all over the hood and front fascia.

Will vinegar be ok on fairly non-fresh Whiteout paint?

I've got clay and lots of lube spray if that's what it will take, but the vinegar would cost a bit less elbow grease.

Calcium chloride. Vinegar away it won't hurt the paint in any way. Just throw a coat of wax back on after you are done.