Got my copy of this G&G RK-104 from Tru last week.
Here is the description from WGC about the rust and the aged look on the receiver and the selector plate: 'Special coating on selector plate ,easy to create realistic scrated and aged look'.
My selector plate has a bit of rust...but overall I love the look of the gun. Great value for the money plus if you are the owner of a TM full stock Ak, you know for fact that they are not all so perfect as well. For example- bute plate will come off during game playing,front sight tends to wrobble and the pistol hand grip on the G&G AK has a much better feel to it.
I will have more to say about this gun at a later time...once I get to fire off a couple thousand rounds of BBs.