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Originally Posted by YotaRunner4
This is from hard water. Hard water has a high content of minerals that can affect taste, and in this case, and maybe even in chitty's case, can leave residue on the surace of cars, dishes, mirros, etc. The "spots" are left after the H2O evaporates, and leaves the minerals behind. After this happens, it can be a pain to get them clean.
Chitty, do you use hard water when washing your car? My 4Runner is Anthracite Grey (very similiar to Magnetic Grey Metallic) and I try not to wash it when it is very sunny outside since I have hard water as well. The problem is when you use hard water, the sun can evaporate the water before you get a chance to dry it with a towel, and leave the little spots "etched" into the paint.
To take these spots off, I recommend re-washing using Dawn dish detergent and dry right away. Then use Meguilars Quick Detail to finish it off. If theya re still on there, then you will need to do a full blown wax and polish with an orbital polisher.
To get around this, user soft water to wash your car from now on (if you can). I had to redo my plumbing to get one outdoor spicket of soft water.
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I have the same problem with hard water. I too found Dawn to be the best alternative to car wash. It seems to break down the mineral spots much better. As he stated, avoid any contact with direct sunlight while washing and drying. I don't have any shade at my home, so I drive directly to the park for a quick dry and wax. The only difference is that I use Mequires gold class liquid wax.
