If you are coming from the roundabout where the firestone is you go under the railway line then at the next roundabout take the first right, that takes you into a poligon, go further in and Ebremetal is in there, there are also a couple of others too in there.  Basically go in anywhere that looks large and decent and ask, most people will fall over themselves to help and if they can't will tell you who will, one thing though do try to speak the language!!