The kinds of surfaces suitable for colored pencil are nearly endless. If a surface will accept dry media of any kind, it will work for colored pencil, often with a minimum of preparation.
Using Colored Pencil on Sandpaper
I recently described 3 basics of drawing paper, including the most commonly used papers for colored pencil. A subsequent article listed 3 non-paper, non-traditional drawing surfaces for colored pencil. One of them was sandpaper.
What I didn’t do was show you how I used sandpaper with colored pencils.
I described the drawing process in an article written for EmptyEasel. Read Using a Sandpaper Surface for a Colored Pencil Drawing here.