Mesh Smoothing STL File Import


I am importing STL files from solid edge for rendering and applying materials. Conversion to STL is 0.01mm. Below is an example of the problem I am having. In the example I have applied a metallic material.

The normal are all pointing in the same direction to my knowledge and I have no double to remove. Below is a screen shot of the mesh.

Has anyone come across this problem before and have a solution?

Regards G