You make valid points nova_robotics and I don't intend, nor am I qualified to disagree with you. But ..... allow me to explain.
I used to work for a transport and earth moving company many years ago and although I worked in the office I spent a lot of time in the workshop and machine shop as I've have always been very interested in what those guys were doing and how they did it and I used to spend free time out there doing things for myself. The machinists had a big roll of brown paper, the sort that was once commonly seen in stores when purchases were wrapped up. This was rountinely placed onto the mill and shaper tables to prevent corrosion between table and fixture and some things were worked on for several days and remained wet with coolant without ill effect to the table or fixture.
I haven't tried this in my own workshop but surprisingly it worked for those guys. Unfortunately it's too late to find out the type of coolant they used.