I have had a Unist MQL mister on my machine for about 3 years now and I will tell you they work great for machining aluminum. Do a google search for Unist MQL system they have some video of the system. The best thing is you get lube for the bit but the chips are dry. When I first got the system and machined aluminum with my router I covered the LDF vacuum spoil board with plastic because I was afraid the oily chips would damage my spoil board but the chips are dry I don't even bother to cover the spoil board anymore and there is no residue left by the chips when I clean them off. The MQL system is not a normal mist system it uses very small quantities of a special oil. I just want to let you know this is a great way to cut aluminum with a router. I have no connection to this company and have no financial gain by recommending them to you.
Mike
https://www.youtube.com/watch?v=mSojli2LDtU
https://www.youtube.com/watch?time_c...&v=8GjjKbN33-M