LPC3 (or some sort of lubricant to keep the aluminum from sticking to the cutter) goes a long way.
I would think that you would want something a bit more "robust" than a Dremel for porting.
I use an air die grinder (porting tool) that has a 1/4" collet and accepts a wide variety of cutting, sanding, & polishing bits.
Actually, I have several (to speed up the porting process for business purposes.)
I really like to use the cylinder spiral flute ball end cutters for the bulk of porting. A reverse cone for working the inside radius and other undercuts, sanding rolls (tapered and straight) for minor material removing, and flap wheels or similar for polishing.
You can pick up a pretty decent starter kit of sanding rolls and polishing pads used for porting from Goodson Shop Supplies. That would be a great place to start. Tell Dave "Hi" for me and that I sent ya.
If you plan on doing a lot of porting, spend the money for a good die grinder (ie NOT Harbor Freight quality.) Personally, I'd rather purchase a good quality used tool from an aircraft maintenance surplus (or similar) than some of the new stuff on the market today.
Most of my personal die grinding equipment came from surplus aircraft tool actions and surplus tool shops. Some are 30+ years old and still used in the shop if not every day, nearly every day.
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Thanks and God bless,
Brian Carlson
Carlson Racing Engines
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