I had an idea when it came to doing the button, which I thought made it look more realistic. That idea being, add a finger print and see wha it looks like. The texture is pretty simple, with only a little bit of rust applied compared to the box itself. The reason being is I would image the Button would have been touched and used more than the Box, so I wanted it took look less abandoned that the rest of the model. Even though obviously it's abandoned at the same time.
I'm happy with the finished render of the button, the darker area in the middle clearly shows where pressure used to be applied, making it look more realistic.