I have this awesome green-tinted mineral stuff that I brush on whenever my face is wicked red. I was skeptical at first, but it neutralizes the redness and doesn't turn my skin green. Just a little coating does fine. I don't know if it'll help you, but it's been great for me, for both cosplay and everyday use.
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PM me your local conventions to add to the map
COSPLAYS IN PROGRESS
Utatane Piko - default (Vocaloid) - 90%
Connie (Shingeki no Kyojin) - 0%
Sheik (OoT/SSBB) - 3%