[Smrtman5]

Im a fan of Cool Tool II, its not water based so it doesnt rust the machines if not cleaned up right away. It does have an odd odor- it smells kinda like chicken to me, but its not dangerous. Ive known old school machinists to recomend kerosene for aluminum, never having tried it, i wouldnt know- but acetone works for tapping. Im not a fan of the oils for tapping Al because the chips just get stuck to the tap and i get stuck with a sticky dirty mess. I usually machine Al dry anyway unless im making a large hogging cut or drilling an excessivly large hole. If youre making the Al extrememly hot, youre probably feeding too fast- thats my theory.