Problem with shading on model

I know that this is more of a modeling question than a specific Unity question but…I have a problem making the models in maya. I am self taught and new to maya and used an online model but I have a strange problem of shading of this model. How to I remove the shadow looking overlay on the model. Here is a picture below.
[1273-Screen+Shot+2012-06-16+at+5.04.20+PM.png|1273]

You’re using smoothed normals. You need hard edges.

Do you actually have faces that aren’t visible? That should lead to that look, and be bad for performance and ability to work with the model.