Oleg, we're all waiting for your next tutorial!
Darimc, Looks like you discovered the Cloud and Overlay functions in Photoshop. You need to add scratches and contrast. Maybe some bumps to give things some depth. Since putting in dents or rounding edges adds polys to a model, it's best to simulate them with your texture. Also, everything is flat lighted. We know that light reflects differently because a surface isn't perfect. You'll need some highlights to your textures. You're off to a good start.
"I'm trying to find new ways to make this game more attractive." - Dennis Rodman