Hmm i would recommend you using claying first, if its still there hit it with at most 3 more passes, if its still there then you might need to try a more aggressive clay bar, if its taken out then just use a polish to clean the dulled surface, if its still there i would recommend you try this product but with moderate pressure only, no heavy pressures with this product, if its still there, get some shampoo and 2500 grit wet sand paper and wet sand the part and return the gloss with this product.





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