Ok,

so a bit more research, how about the cold air gun approach? I have a decent compressor with plenty CFM output. If the temp is right would the aluminium cut well with a cold air system? this would remove the need for coolant.

The machine will primarily be cutting ally plate I would imagine but it will be used to cut hardwoods as well and I know of the evil wood snot you speak of when mixing wood and coolant as I have had it before on my lathe! its worse than concrete.