Well, most of the time, the person that I'm working with has their own foundation anyway, but sometimes they don't, and since I can build it to a medium coverage (i don't really ever get clients that need or want full coverage foundation, except for weddings, but they always have their own make up anyway) then it might be a good way for me to start a collection of foundations. I use a stippling brush for foundation on everybody anyway.
Hmmm...it would save me money buying the 6 of these instead of trying to buy like 12 different shades to mix....hmmmmmmm