Jib unfortunately I have atm no direct possibility to take a pic. I know that it is quiet hard to find any good reference in terms of scars in the face region. Especially if you are intending to model scars caused by medieval melee weapons, which really had far from nice edges and caused ugly wounds.
However I will provide you a link by PM about a quiet famous and disturbing pic of a Hutu with heavy scars in the face region caused by a machete, so that you can expand your model on it. Important to know is, besides the terrible message it bears, in regard to all the suffering which happened in Rwuanda, that his wounds got medical threatment, which means that the buldge is not as wide as it would be without it. Which is quiet important for your Model, since I don’t think Orcs would sew any wounds at all, due to their nature, and due to the period of time. While you can say that the odds to survive such wounds without threatment are really minimal, so you have to find a balance for yourself what makes your orc combat proven but not to overdone.
Other fictional references can be found in the movie Lord of the Rings, where you see some Orcs with “well” shaped scars in the face region.
I like your model in general, but just thought that I could provide you with some feedback, even if its just a small detail like a scar.