Originally had the idea to make the boss as a background for the base of the model but thought the icons would be a great idea for a coaster. They are completely flat (2D extrusions so they should be) there's a lip around the edges for condensation.
I painted them beige with a dark grey center
I will probably make another version with a square to mimic the map
.4 nozzle works but a .2 nozzle will get much more of the details since the lines can be razor thin