Retouching and cleaning images of gearboxes

Hi guys,

I need a retouch and cleaning up of about 65 photos. These are gearboxes and ideally, I would want them to look like new after the retouch.

The job needs to deliver:
1. All photos to be retouched to the exact same standard,
2 . Each photo needs cleaning and retouching,
3. Each photo needs to be delivered in the same size,
4. Each photo needs to exported as at least transparent background PNG.

Sample image attached. If you want to be considered, please send me a clean example.

Thanks.