Mark;I polished an Edelbrock 257 dual quad intake and I can tell you it takes a long time and is alot of work. Not to say the end result isn't worth it! The Eastwood polishing kit is a good kit, but it is really for the final stages of polishing. The big problems I found in polishing these intakes is that the castings are rough with alot of angles and tight areas and the manifolds themselves have alot of surface area. I started out hand polishing the intake with#400 emery. You can try using power tools in this stage such as an angle die grinder, dremmel, etc, with emery cones, cross buffs, flapper wheels, etc, but you run the risk of cutting into the aluminum too fast. I then went to #600 emery and then #800 emery, all by hand before I even started using buffing cones and other buffs from the Eastwood kit. After I got the shine I wanted, I sealed the aluminum with Zoops Seal. Eastwood also sells a clear spray sealer which I bought but haven't used yet. So, my advice would be, have at it, take your time and be patient. I did mine as a winter project. I brought it in the house, sat in front of the fireplace at night, and polished as I watched the tube. GOOD LUCK!
Rono