I used it before applying Zaino. First time I tried it I didn't know how it would come out so I tried a small section on the roof so if I messed up it might not be as noticeable. But if you use a solution and a light touch (as someone else said) it comes out beautifully. you know your done with a section when your clay bar glides like a hockey puck on ice....no more particles. Makes applying polish easier too.
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