You can use about any brand, I prefer mineral oil based soubles myself. I used trimsol for a while, worked very well but you will get a better finish with oil based coolants.
No matter what you use you have to care for the coolant, if you let it sit for two months anything you get will go bad. Skim it (keep the tramp oil off the top) and keep it moving with a bubbler or small pump 24/7. If you can do the makeups with DI or RO water as with evaporation and makeup the solute concentration rises, eventually ruining the mix.
Friend of mine taught me a trick with a shop vac, by holding the nozzle ust above the surface of a quiet tank you can suck off the layer of tramp oil pretty well and leave the coolant alone. (Makes for a smelly messy shop vac.) |