I have worked for Lockheed Martin for some 50 yrs. and have drilled a few holes myself. We use a product called Boelube to keep our drilling from dulling of corse you bolters would cry if you knew what we did with most of our dulled out drills
. Basically Boelube comes in liquid form a paste etc. etc. We generally use push tube White and the 12oz. Blue. I believe you can buy it on Amazon
. Back in the early early days when I worked on the SR-71 we used Bees wax believe or not. It had already been mentioned but the harder the metal the more pressure and less RPM.
