Next step we will eliminate them.

The first thing to try is select the offending faces, and in the menu go Polygons->Normals->Reverse

If the face(s) are still black, we have to use brute force. This is often the case with imported objects and mixed applications. To do this, again in the menu, goto Polygons->Normals->Set Vertex Normals, Option box

You will see this: