I tried this today and it works *wonderfully* for me, so I wanted to pop in here and say THANKS!
Backstory: Bought mineral makeup (a sampler) and thought I'd pretty much wasted my money. I need more coverage than I could get with MMU, it settled into my fine eye lines (yes, at 28 I have very fine eye lines), and the "powdery" look drove me nuts. I hated it. But, after reading your tutorial and trying this out, I was able to go *all day long* without having to reapply powder AND I received quite a few compliments on my appearance. I thank you from the bottom of my heart!