Been looking into this stuff myself in the last 3 or 4 weeks ive had to wash my vehicles which arent under cover( the z is ) at the minimum once a week because of whatever is falling out of the air which looks like dirt at first but if left to sit a few days turns into rust spots all over the top of my cars . putting a nice coat of wax on them has helped make it easier to get off the first time i used cleaner wax ive never had this problem before i dont know if its cause it hasnt been raining hardly at all or wtf .
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