With SP1 a small edition to the color editor has been made
that could have big ramifications.
The edition of a "remove all colors" button state is given
when you enter the color editor without any pre-selection. When
pushing this button, when in this state, will remove all the colors
from your model or assembly. Of course it will not work to remove
PhotoWorks materials colors, so turn off the "Display PhotoWorks
materials in SolidWorks" if you want to remove SolidWorks colors.
It does not have the ability to remove colors from referenced parts
to the assembly or subassembly but works at the part orsingle
assembly level only.