Used on its own, any kind of wax finish on a pen is a waste of time - the wax will wear off in use within no time at all. Used over the top of a chemical finish such as polyesters, malamine, CA etc, or over the top of an acrylic blank, it will add to the shine but will still wear off quickly. There are better alternatives for that purpose, such as microcrystaline of carnauba. YG and HS make good products, but they are not all necessarily the best finish for a pen.