Most Createx paints come pretty close to how it needs to be thinned. Open a bottle of Createx and try to match that. To thick won't spray through the airbrush, add more water in small amounts. To thin and it runs easy and doesn't cover well, add more paint, stir and try again. I know that isn't the answer you were looking for, but the thickness of different paints is not uniform, some just need more thinning than others. You will develope an eye for how thick it needs to be. I would rather be on the thin side than the thick side. If it is to thick, it won't spray enough to tell what you need to do. Have a scrape area to test spray the airbrush at so you can get it adjusted before you point it at anything important. I found that I wanted to spray to heavy of a coat when learning. Spray light coats, dry, spray again. It is amazing how much better paint looks after you put the clear coat on, especially black. Keep a damp rag handy and wash it off and do it over. One thing I learned from Tiger was to get the basic pattern good, add a top coat of clear and do the rest of the pattern and that is as far down as you need to remove paint if you mess up after that point. Good luck