Wow, no replies in 29 days?
what I would do is *with a digital so I can see if there was glare* is to take a picture straight on the way Id want, and if there was glare, take a picture on an angle.
But instead of using flash, perhaps you could set up extra lights in the room around the object so you dont even need a flash. Perhaps put something over the lights so the light is difussed and is more even over all of the subject
And if that doesnt work, what you could do is put the camera on a tripod and take a longer than normal exposure to get a good exposure.