If a CAD file is in one part and the format is IGES, can I add different colors in Keyshot?

I made the tutorial.

  1. Step 1:

    Everything is one body

  2. Step 2:

    Go to the object and select the part where you want to change the color

  3. Step 3:

    Apply new color to the part

  4. Step 4:

    End result