Straight from the Green Lantern Corps.
You can glue a 10 x 1.5 mm round magnet in the base.
Recommended infill angle: 90°
Low speed and high temperature will create a shiny top surface.
There are "holes" inside the model to make some of the top layers more uniform, and they were created with 0.2 layer height in mind.
If your top surface is not flat & shiny and you see scarring, then make sure to check this guide: https://bit.ly/2UtN0I1
The author hasn't provided the model origin yet.