Hi, for example I got StaLube soluble oil . It is advertised as "no rust" . I've seen few videos of mist cooling systems successfully using it and I wanted something "oily" as close as possible to the WD-40 which I've used mostly for manual cutting, but preferred cheaper solutions, so I ordered it.
Is somebody here who use soluble oil? What do you say about rusting? How much water do you mix in for mild steel, aluminum?