haha...I've been spending too much time with ork and nurgle stuff I think...this looks basically "brand new" to me
I can't really imagine the mechanicus would let any kind of technology in their possession fall into a "nurgle/ork" level of disrepair though, so this looks about right
think I might second Gunzhard's suggestion of getting a bit of rust on there though...I haven't personally used that MIG stuff, but I've heard nothing but good things