Jaguar XF consept car

This is a picture of the Jaguar XF Concept car. I used Graphite powder, Derwent onyx pencils and Faber Castel H,H4,B and B2, the support is Daler Rowney Ebony 109lbs paper 12x12 inch, I am not convinced that this is the best paper to use as it leaves a texture to the finish so if anyone has any suggestions it will be most welcome.