tapping aluminum

I have used several lubricants when drilling and tapping aluminum
with either a hand tap or cordless drill with adjustable clutch.
Used,A-9,light oil,even kerosene drops.
Accidently discovered "No Touch" windshield spray !
One little squirt on tap and you are all the way thru 1/2" 6010
without stopping. I get three or four 75% threaded holes before
applying again. I get it at local auto stores etc.

CB