sincky, i use tamiya brand thinner because it has a retarder that helps diminish tip dry and helps the leveling properties of the tamiya paints by slowing the dry time a hair. i thin with it only and the 200ml jug will thin tons of paint for the price so i consider it well spent money. i clean my airbrush with another agent as to not waste the rather pricey tamiya thinner, but for me, $7 for thinner that will last for a long, long, time is money well spent. the iso will work but you may experience some tip dry and rough finishes if you not careful.
i spray future straight from the bottle with 15 to 18 psi. later.