PC over a new Alum valve covers

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    Hello , I`m new to PC-ing . I pick it up to do my own projects . My question is , I have a new set of VC that are polished and I want to coat them , Do I have to blast the VC before PC or do I just scuff it with a scotch brite . then out gas it . Or do I just clean and out gas it .

    Thanks ,

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