Just tuned my skis for the first time, and using initially a regular stone and then a diamond stone with a guide set for base at 1 degree and sides at 2 degrees did the edges. This is on a pair of Salomon X-Drive 75 skis. I then waxed the bottoms a few times, just going over the drips of wax with the iron set at about 120 degrees C, and while doing so the wax streaked up before I scraped and brushed it away. This streaking is normal, correct?
On a side note, when I put a straight edge on the ski and shine a flashlight on the other side, all throughout the ski there is a slight concave towards the middle and less light at the sides. It is slight, enough for the light to come through but not enough to slide a piece of paper underneath. The light is not completely uniform, just a little more in the middle.
Also, When I look at the metal edges, it looks as if they slightly wing out towards the ground (when the ski is upside down) so they aren't flat. This is good, right?