I was given a bottle of one of these things as a present but avoided using it for the reasons given by Skidpan. Anything that makes you rub the dust and grit on the surface over the paint is bad news. You can see the effect a mile away on dark metalics and less on light colours, known as spiders webs. Hose off as much loose dirt as possible before even starting to wash.
I did find a use for this stuff and it was actually pretty good. When your car needs a good clean, when the surface feels rough on the lower parts of the doors and tailgate even after a wash, ithis stuff removes a lot of the tar and tree sap specs stuck to the paint but i always wash first.
Edited by Stanb Sevento on 21/06/2017 at 15:58
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