Another option could be to using the "Dip Your Car" rubber spray on. It should last a year or more before needing to be touched up. Also, you can get numerous colors.
I am actually going to do a flat black or olive drab on my red insight sometime in '13. If I do Olive drab I am thinking of doing the wheels in red, to match the new decals I just got for the insight.
2000 Honda Insight MT
Avg MPG: 66 Goal: 71
Current Mods: New Stereo | New Door Speakers | Rear Speakers | Warm Air Mod
Future Mods: Grid Charger | Cruise Control | MIMA