I run a custom printing service for artists all over. I've yet to seriously advertise it to you all here. I do print adult artwork as well. I ship all over the world.
I have FREE template on my site to use, so you can download them and set up your art easy for print.
Luster gloss is a special type of paper that will give your artwork a brilliant luster finish.
Metallic luster paper is a premium specialty paper that works best with lighter pictures. You can use it for accented glowy parts of a picture as well if the rest of your art is darker.
Link
Adleisio
Ooo....I am bookmarking this. :3