Creating Specular Maps….

* First make a normal map.
* Find some texture for details, like scratches or dots, clone it all over the map in Photoshop…
* Import normal map, filter/stylize/find edges, hue it down, invert it, adjust levels and import it in specular map in screen mode. will make your normal map look way better.
* Use defuse map, desaturate it, put it on top on everything with opacity around 60.
* Sharpen everything