When I posted my query about the permanent water spots on my mirrors over on the Miata.net forum I got one response: “I used Meguire’s Number 7 polish followed by Meguire’s Gold Class car wax.” Having neither of these products, but it got me thinking, what else I could use? I remembered that toothpaste is a very low abrasive that can be used as a light polish. So I took a tube out to the garage and swirled away for a while then washed with Windex.
I don’t think it worked very well, but at least my mirrors smell minty fresh. 🙂