Mattifying. I have oily skin and it’s often shiny before I realize it. I tried some mattifying liquid from philosophy (I can’t remember the name, and it seems that it is no longer available) which only make white spots on my face when I applied sunscreen. I’m finding that powder doesn’t work for me. Has anyone tried the mattifying stuff from MAC, Peter Thomas Roth, or Shiseido? Do they work? Reviews are very mixed.