As I had already discovered in my teeth study, light that comes from the side and that is as hard as possible, shows the texture of a subject best. The texture in the chair is very smooth, because it was spray painted. But it is certainly visible and interesting, especially at the places where the paint is a bit chipped off, or not well spread. So for starters, here a difference between the subject shot with diffused and undiffused light. These are both shot with flash light, with the left diffused with a white umbrella.
As you can see, the undiffused light shows the texture much better than the diffused light, this is because the light is spread from many more directions, filling up the shadows of the elements that form the texture. Then I had to decide if the flash was the kind of light that could give the results that I wanted. So I took a few photos with my led reading lamp, pointed from the side of the subject. I also experimented with the angle of light, finding the shot with the best shadows.
In the first shot, the light is coming too much from in front of the chair, then I moved the light more and more to the side. Because the shape of the subject is not completely straight, the price of having more texture is darker areas on the subject. But then, that also adds more drama to the shot and it is actually in the shadowy areas where the texture is most visible, so I was ok with that. Finally, I decided that I didn't like the overall compositional balance of the photo and changed the image from landscape to portrait mode, leaving more negative space in the top. I also decided to check the white balance, since the subject seemed, because of the lighting, more yellow than it actually is. The photo needed some sharpening, because the texture is already pretty smooth by itself, I upped the edge and details quite a bit. This is the final image that I'll send in.