Tried a new coolant mix on our Haas VF-2 and the finish went all wrong

I swapped from our usual 8% mix to a 5% blend with that new TrimSol E210 stuff, thinking it would save a bit of cash. Ran a batch of 6061 parts and they came out with this weird, almost etched-looking surface that felt rough to the touch. Learned the hard way that even a 3% change can mess with chip evacuation and tool life big time. Anyone else run into finish issues after tweaking their coolant concentration?