I tried the fingernail test, perhaps there is the very thinest of a lip, but it is really hard to detect, almost nil.
I am not a metallurgist, so I don't know about the masking process involved with anodizing only one section of a piece of metal. But I am a printer by trade, and in my humble opinion, my faceplate is not printed with a transparent brown silkscreen ink. Depending on the light in the room, it reflects light from different angles, as anodized surfaces do. When you look from below it is darker brown, look at it from above, it is lighter brown. From side to side it changes it in character also. Silkscreen surfaces are more uniform in tonality from the physical layer of ink, and do not reflect light in the same manner as anodized surfaces do.