I just dealt with water spots this morning. I used a microfiber wax applicator sponge and saturated it with Goof Off gel and rubbed it on the painted surfaces making sure to keep away from decals, rubber/plastic trim, etc. It dries to a greasy haze. Then I used a micro fiber towel with vinegar/water/alcohol mix and wiped it down. I washed the entire vehicle with super hot water and Dawn dish detergent to take remove all of the wax, grease, and solvents that build up on the truck. I waxed with Zymol and then spray detailed with M Tech Wax and Instant Detail Spray. Good as new. I park at the ATL airport parking lots quite often and I think the planes put out a lot of caustic liquids that are murder on paint.
