been using the cotton gun cleaning tips to polish engine fins, use the round cotton swabs on the end of cleaning rods with cordless drill, (note use elect tape or heat shrink tubing on the aluminum rods so if thay bump chrome or paint thay dont scratch) thay can be easly replaced from any store that sell gun cleaning supplies, its been working great on mine, no picts yet, oh yea the replacement tips are cheap.. oh & your choice of pollish
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