The CD works well however, lots of people miss use it.
The CD is used to remove surface dust that lands on your paint. When you use it make sure not to just lay the entire weight of the duster on your paint. More like just letting the bristles hang and just touch your paint. This way swirls do not forum.
Also on a car that has actual dirt or even salt on it, you need to use either waterless wash or it is time for a full wash job.
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