I used the same brush for different products when I first got my Bare Minerals starter kit. I just couldn't decide what brush I wanted to use for each product. It took me a few months and additional purchases to get MY system figured out. I use a Lumiere long handle kabuki for my spf powder, a badger brush for my foundation, the flawless face brush for the True/Warmth/Glee. I use the BE kabuki for my mineral veil. I use the BE baby buki to apply my MAC mineral skinfinishes. Pretty much, I decided that I didn't want to put color on my foundation brush and I like the fluffy BE kabuki for my finishing powder. Keep plugging away, you'll find what works best for you.