Yea same happens to mine, just take some 1500 grit and wetsand the lips, will take off all that black lookin shit and get them smooth again, than i take a air tool and put a polish wheel on and go to town on the lips. You can also just sand them and use mothers mag by hand, just takes 5xs as long. but they will look better than new once your done.
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Built bottom end
strapped BC and CP

HTA 60 
PTP when you fedex man gettin this block?
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