Colour control from the stp file

I am baffling myself with the question how to change the colour of an element imported from stp file.
It is a shaded view, no material assigned and it’s properties indicate colour by layer (grey).
MatchProperties won’t change it either. Any clue where to search?

Use RemovePerFaceColors to remove the imported colors and restore the object to single layer or object color.

Yes, that was it! Thanks.
Out of curiosity: which toolbar offer this command?

Apparently in both the Display and “New in V7” toolbars according to the Help topic.