ok, i dont know if that last post was serious or not, but i sure as hell hope not...you always need to scrape the base of your skis after you wax.  the p-tex that makes up the base of the skis has grooves in it that run downhill on the ski, thus giving the ski a 'channel' to cling to the snow wiht...the p-tex is what helps the ski slide down the snow...the wax comes is just more or less a catalyst.  p-tex has pores in it that open up when heated, which is why wax is applied with a hot iron.  the wax gets into the pores, and then when the pores cool down, the wax stays in there.  scraping the wax off allows the p-tex to be exposed to the snow, but at the same time allows the wax that is in the pores to be help the p-tex in sliding down the hill...it does this by initiating a reaction with the snow...teh wax contacts the snow, and more or less melts the snow when it comes in contact with it...this melting, though occuring only for a very short period of time, allows the ski to glide over the area that the ski is in contact with the snow with relative ease.  this is why scraping your skis is so necessary..as well, if you dont scrape your skis, then your edges really have no purpose, becuase say you have a 1 degree bevel, that means the edge is sharpened 1 degree down from the base plane.  if you have a non uniform coating of wax on your ski, then yhou really have no way to tell use your edge consistently.  also, something such as a scotchbrite pad works really well to buff out your skis after scraping..it gives the wax that is in the p-tex a set of uniform grooves if you use it correctly.