Is the air cleaner in "super chrome" powdercoated? That would definitely be a great alternative to polishing.
Or, you can get a polishing kit and do it yourself, but it's A LOT of work. I tried it once on a cast aluminum thermostat housing, and just that little piece took hours.
64physhy, if that's directed to me I need to know which air cleaner you're talking about. If the photo caption says Super Chrome, then that's the powder I used.
Most of the intakes on my website Gallery are coated in Alien Silver or Super Chrome . The Alien Silver looks more like brand new aluminum and is a very popular choice for a restoration.