Here's an interesting shot, great work on getting up close and working the subject. Only a few minor tweaks I would make.
- The image is out of kilter just slightly. Since the handles aren't even you need to look at a vertical. I used the center seem to line it up. Though it's so close you don't really need to.
- This is the prefect type of image where the uneven symmetry makes it perfect for dead on. The old saying is "dead on (center) is deadly". This breaks that rule. I want to see the symmetry in the image, the best way to do that is to put it dead center of the frame.
- OK, so this grey metal is there in real "life". As a fine art shot, I'd take it out (if it's supposed to be a historical representation, leave it in. I am fine taking things out of an image (power lines, people, bits of crud) if I am working with fine art.
I did a little cloning, cropping and used Nik Color Efex 4 to punch it up using Tonal Contrast. It was a good image to start with.