Why polish when you can have it jet coated which gives a polished aluminum appearance..but also actually has a benefit as well. And is only about 100 bucks to get the intake man. coated. My Intake manifold , and valve covers, and power steering reservoir is at HPC getting their polished aluminum coating as we speak....will post pics when i get them back if anyone interested. I also sent my TB to have them polish it since cannot dip TB unless you remove all the TPS and cables.and i didnt want to mess with it. Intake man.....110.00 Valve covers 85.00 for both , and i think 55 for power steering to get coated. Not too if you ask me and actually will reduce temps.