Avatar keychains for 2 color printing by pausing mid print after 2mm height (i.e. till 2mm included is the base, next layers are the top).
I printed them with different glow in dark colors, the glows are not equal brightness but works well! I chose weak glows as bases and stronger glows as top, but didn't did with standard green glow as it's much more bright and others will be pale in comparison.