I, too, am having discoloring problems. I will try the tips above this weekend but I have a question for Chris.
Which M-F product are you using? I don't see a white pearl powder and in
Liquid color I see:
13 iridescent pearl
14 pearlescent
Point of interest regarding Cal's post.
I used LC liquid pearl and a drop of their white and it turned into sweet potato. It didn't smell burnt and I like the color but didn't write it down so I don't know if it repeats.
Thanks, Dave