Couple of quick notes/Suggestions: On the Bodine Gold car take a quick look at the rear bumper corner in your render. The top of the right side bumper has an artifact. Your gold layer might just need pushed a bit in that area to fill that in. I find those sometimes with my own paints.
Additionally, something I would consider is on your gold base layer ( I am assuming you're using Photoshop... Going into Effects Add noise and setting it to monochrome, then adjusting it to roughly 3% or somewhere in that area. to create the metal flake effect to fit with the awesome gold you got there.
Again just some suggestions. You don't have to do any of it.
Additionally, something I would consider is on your gold base layer ( I am assuming you're using Photoshop... Going into Effects Add noise and setting it to monochrome, then adjusting it to roughly 3% or somewhere in that area. to create the metal flake effect to fit with the awesome gold you got there.
Again just some suggestions. You don't have to do any of it.