Just as the name implies, give us the ability to dye the CF block before compressing it into a capsule so when we use it and it dries, we get the respectively colored CF Wall.
Doing a Huge Building Using CF and then painting it its a major pain in the ass of restocking the painter every 20 blocks or something.
And as a bonus, you should totally try to get Painters to work with RedPower Paint cans.