For this batch, I took the rubber spatulas and layered the different colors (including the white) into the mold.
Variation: For you folks out there with cookie or cake-making equipment, you can mold or pipe this soap just like you would frosting or cookie dough. I globbed some of the soap into my cookie-press and made small soap "candies" that will be great for individual hand washings or decorative bathroom soap bowls. (Be sure you put them on wax paper or a stainless steel cookie sheet - the soap will corrode aluminum!) You could also decorate existing bars of soap like you would a cake or cookies with frosting.

