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Re: Polishing the cast manifold.
well i've done some cast metal polishing. u can clean it. to get it smooth your going to have to sand it down alot. starting with very coarse slowly higher and higher grits up to highest grit u can find. 3m has a wet 3000 disk. sometimes water help the high grit papers from clogging up so fast. then some sort of buffer or polisher with high speed 3000rpm least. but dont go to high. and use some heavy compond or metal polish up to a fine polish so get that shine. car parts store in body section or body supply store will have it. then i would look into clear powder coat. or sand it smooth and have it cromed or nickel coated would work too. it would probably be easier to have it coated with something after u sand it smooth. it will be hard to polish in all the little spots.
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