One of these was not painted, it is just plain white with a little pearl mixed as the base coat. The one on the left has glue/green on the back, a little yellow gold down the side, and black dust for the spot. The middle used ocean blue, with a hint of light yellow as a band, with black for the spot.
On both, the eye spot used red dry erase marker with a black dry drase spot in the center.
Heat with a heat gun until the plastic just starts to shimmer, or get sticky, then back off the heat and let it cool.