ProE igs models - Some materials not working on certain surfaces

[iecokc]

I'm trying to attach materials/paints, etc. by layer on a ProE igs model.  Most of the models I've used work fine, but a couple of models I'm using the new paint won't cover all the surfaces on the layer.  How do I fix that problem?

[guest84672]

Why are you using iges? You should use native Pro/e data. Also, I don't think materials by layer are supported. They need to be applied on the part or assembly level.