Kimberlie posted:@Julia M. Usher, thank you very much. Thank was alot of info. I too was hoping someone would answer along with some examples of their work, like PIP I agree it can get very expensive testing things when you are just doing this as a hobby rather than a business. Your answer will help greatly as you let me know what you were using for what applications. My airbrush was bought as a gift a few years back by my husband after he nosed around and figured out how to ask you online, so I love it and don't want to mess it up. I am thinking that after reading your reply that I am seeing metallic food colors that are not sold here in the US. I also am guessing that extended would mean they have a longer shelf life? As always you have given me the resources I needed. Again, thank you.
All of the brands I mentioned are available here in the US. Some are manufactured elsewhere (PME is a UK product, for instance), but all can be found via US-based online suppliers (and even in on-the-ground US shops). See my comment above for what I meant by "extended". Not what you thought. 