Another way. More simple, by the way.
Just clone this nose, close and fill without outline. And put behind your current nose shape. That's all! http://www.talkgraphics.com/images/smilies/smile.gif
PS
And all these operations you can do with the shortcuts by the way:
Ctrl+K / F4 / Tab / (fill with your color) Ctrl+Shift+B /

Alexander