I received my Loki in August and had a problem with the head. I read that it's quite common that they have a shiny spot. Mine had something more than that- it looked like someone dropped seethrough paint on it. I told sideshow about the problem and also that the packaging was slightly damaged. They offered 25 USD or a new head. The packaging could not be replaced. I have received the new head, but I think it is slightly shiny on the forehead :/ I'm not sure if there is anything I can do now.
All in all though I like the figure very much

I wanted to share old and new loki side by side for you.
Both Lokis 1
Both Lokis 2
Both Lokis 3
Both Lokis 4
Both Lokis 5
Both Lokis 6
Both Lokis 7
TDW Loki Aether
TDW Loki Dagger