I’ll be doing 2d contouring, boring, and thread milling with cast acrylic most of the time. But it’ll be like once every week or two. Based on your recommendation, I’ll be switching to this coolant:

TRIM Cutting & Grinding Fluids SC520/1 General Purpose Semisynthetic Fluid Concentrate, 1 gal Jug https://www.amazon.com/dp/B00R9LXVKY/ref=cm_sw_r_cp_api_i_Wok4EbQK5SKXZ