Hello Glenn!
Recently I got "liquid pigment" too (although from another company), and I find it hard to control, after applying they tend to "creep" pretty far on the surface of paint, and once it's on, it's on, can't seem to remove it. But I don't say it can't be used for something good, I just have to find a way to get it to do what I want, or want what it does :-)
Have a nice day
Paweł