hi guys thanks for replay,

of course i have photo shop, i am using for years , I made so many uv texture, but when I try make something like that bit difficult. trying to get th rusty edge with uv snapshot and inport to PS , than work on it, cant really get so smooth texture on the edges, specially the scratch gives great looks to the model,

just wana know if you guys made something before and have some experience with this kind of texture, some image reference that will be good,
also new movie the little robot, it is amazing and full of this kind of texturing, so I need find out how did they made it,
yes it is photoshop and uv snapshot, I made my process till layers in photoshop, but create this edges(rusty or scratch) drive me mad. so I need some tutorials from photoshop how can you create this effects,

please let me know how can you do it
thanks