I was doing this tutorial. I think the UV unwrapping in the tutorial is not done well. I think the UV map should look like this
But these top and bottom views show that I have done something wrong. Either in my UV unwrapping or in my node map.
The top view shows much more "rust" than the bottom view. This is why I think I have done something wrong with this "rust" image texture.
Here is my node map
How to make a realistic rusty chain link ? What should I do better ?