Metal processing

Recently I’ve been working in the mechanical production part of my company. This is where the metal parts are produced.

So I wanted to show the different stages a part goes through before being complete.

Here are some test shots:

However, I’m not quite sure on the composition and what backdrop to use. Any ideas on that would be much appreciated.

Here’s the latest render.

Decided to use the freestyle render to show the first stage of design. Took a picture and have composited it as a paper design.
I think all also be adding little chips and metal shavings for better realsism.

The Latest Addition to the project, with added dirt, metal scraps and saturation lowered slightly: