I am looking at milling 4140PH (Rc of 30) and from some reading the recommendation is to dry mill with air blast for chip removal as coolant will cause thermal shock to the carbide and early failure. Doing this in a maker space (not my machine) so limited on what I can set up or modify on the machine. I know it has coolant setup but not aware of any provision for air blast. How is this usually done other than just hand holding an air hose to keep the chips away from the cutter?