wanted- recommendations for coolant.

My shop has HAAS MiniMill, Lathes, Knee Mills, Surface and ID OD grinder, Vertical and horizontal band saws.

I am trying to keep students as safe and comfortable as possible from skin irritations and smells. I want to try to use the same coolant in all machines and have have low or no odor. I have been reading up and don't think i want anything water based due to bacterial build up and smell.

We will be cutting anything form acrylic, wax, aluminum, steel, copper, and brass.

Thanks
Mike