I have noticed that when I use Fiebing's Professional Oil Dye, it looks great on solid backgrounds with no tooling. When I use it on tooling or stamping it does not soak in to the tooling and darken it to where it stands out from the rest of the piece. I don't like Eco-Flo, however, it DOES make my tooling stand out when I wipe off the excess pigment. Is their a trick to using the oil dye on tooling, or is their a product that I can darken my lines with? Its really driving me crazy, because I want to use Fiebing;s only.