Weird texture on surface of model I am currently making my own Overwatch Wallpaper and are doing the logo of it right now. So I have moddled a it and painted texture on it, as we know the design. But for any reason the texture is looking like this: 


You can see the darker stroke in the bottom of the picture and on the left.
Why did it happen and how can I get rid of this? More pictures of the model following. 

Untextured: 


the mesh: 





in paint mode:



and then the texture as a image itself.
I have found a solution to this. So I had to use two different materials for both the yellow top and the silver part of the logo. I heared that this issue is caused by too dense geometry there.