i took a "class" on this. the rust is harmless except for the fact that your edges are slowly getting eaten away. a good tune will get rid of surface oxidation. if it's really a concern to you, wipe down your skis after using and keep them inside (i sleep with mine). that should keep the rust from coming back. now, if youre one of these newschooler guys, then it dont matter, because your rail slide is doing waaay more damage to the edges/skis then rust ever will. NOW THAT'S THE DEAL- GO SKI.