I have been using flood coolant in the last couple of weeks.
I have made two observations:
1) Way oil was washed away and ended up in the tank, becoming tramp oil and covering up the coolant.To fight off that tramp oil, I bought a skimmer from a local place in Bensenville, which seems to do a great job.
2) Despite that, the coolant seems to be protective from rust and the lathe does not seem to rust where oil was washed away. So the corrosion inhibitors in coolant continue to work.Since two weeks is not really enough to make any conclusions, I want to ask anyone if the coolant offers enough lubrication and rust protection to the lathe bed. Or, perhaps, I need to continue to use way oil and should dutifully skim off off the liquid in the tank?