Structurn is great till you get a core shot then you fill it and get a stone grind. It's nothing spectacular and honestly it's a gimmick. Rocker makes a board faster too then again taping sand bags to your tip and tail give you more speed as well so why don't we start that trend? Wax as normal.
After a few full tunes, Structurn is gone. Sure it works, but it has to be there to work. And yes you have to wax DC boards. Wax-impregnated bases still need wax; they are not "endless-supply-of-wax" bases.