Pouring the epoxy tip Carefully align the Play-doh bead to the outside of the edge/tip mark. The bead must be of greater height than the blade thickness in order to accommodate the epoxy. Mix epoxy and desired filler to a mayonnaise consistency. I use a mixture of silica and sanding dust. Pour the mixture into the space between the blade and Play-doh carefully working about bubbles. Cure until solid then remove Play-doh and roughly shape with rasp. Let cure until hard then finish shaping by sanding. The finished blade with the epoxy tip.