Overall a fantastic job.
My only criticism would be the scratches on all of the metal plating. You used nearly the same shade of metallic for all of the scratches. This gives all of them a "uniform" appearance. Some of the scratches should be darker, indicating they're deeper or older, while other surface ones should be brighter.
I was very pleased with the results, it took me almoost two months to complete it. I had to paint it in separated parts as it is very difficult to hold it.
Over all I had a lot of fun painting it, it'a very well done model.
Please feel free to leave a comment, I'll apreciate