colored foam

Just picked up some walker blanks today and saw a few blanks that had two stringers about two inches apart and in between the stringers was colored foam. they had blue, green, yellow, and red. Is Clark doing anything like this. Can you get blanks that are fully colored. for making boards that are one solid color, Man, that would save so much time not having to paint it.

you can get custom high density foam stringers from clark. if you are a small builder you need to go to a supplier of clark, like foam-ez. how are they with a block plane (h-d foam)?? is a razor plane better??