TY all, so the consensus is to use something in addition to the paper, i guess.
those dam aluminum bits were buggin me and i really don't wanna paint um, so i picked up a small HF blaster and some glass beads..............now them bitches are clean. still a dark dull grey, but nice and clean and i'm cool with that.
was about 30$ for the gun and media, less than the cost of 1 of those fancy billet pieces i keep lookin at.
worked well with the pulverized glass . spotless with no evidence of use on the subject, the glass doesn't scar the soft material.
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