Hi,
I find that the list for Style in the Part Painter Ribbon Bar is empty and I need to add the faces styles into the list.
Unlike in Assembly environment, the list is available by default. (Maybe I'm missing something here.)
To add the Faces Styles;
1. In Part Environment, go to Format > Style...
2. From the Style Dialog Box select Faces Styles.
3. Click the 'Organizer' button.
4. In the Style Organizer Dialog Box, you can add the colors to your preference.
5. Close the Style Organizer dialog box, the Style Dialog box will reappear then click Apply Button.
6. Do as what Kyle had suggested.
HTH
Regards