You can also try using the color key filter and maybe monkey around with the color tolorance – edge thin – edge feather sliders. see what happens. Also, and this is very time consuming depending on how long the footage is, you can save your footage as a film strip file and pull it into photoshop. You’ll have to fix it a frame at a time. Very time consuming and hard to see the results until you pull it back into AE.
david