I have a head model printed in white detail material but since it is 1mm thick. I am thinking painting it inside with either white acrylic paint or with black printer refill ink . What do you think would be better solution in this case? https://www.shapeways.com/model/694341/jim.html You can almost see my finger inside.
I moved you to post processing as you have a good question, and the people here will be better able to help you out as they have experimented with painting for numerous reasons.
White paint or primer on the interior is the way to go. Printer ink is not opaque and I worry that if you use black you'll also end up darkening the appearance from the outside. Good luck!
Thanks! I painted inside with white acrylic paint and it does look better. It got a yellowish hue even though paint was white, but it is still a bit better.