Just use some steel wool or a file. Be careful with the file though.
=================================================== You got beef!? I got vegetables!
"My brother also took a shit right after that. Yes, INSIDE the car in bumper to bumper traffic. He took a shit in the car. He layed down napkins all over the floor and shit all over them. It was so funny." ~ec156
When I run, when I'm high, I just forget to get tired." ~mothaeast
Some sort of hard plastic (milk crate). This works for me with both my skates (the blades are sharper than ski edges) and my skis. It will dull the edges without totally removing it. If you want to remove it go with a rock.
Detune... if you don't your edges break faster. They catch for the first few days which can cause cracks more.... detuning ships that whole process and is safer. I detune tip to tail... everything.
And I would just go to the hardwear stor... get a file. Then you don't just go at it. You work tip to tail, and from the tip of the file to the portion close to your hand. do about a foot at a time.
Hole the file at about a 45 degree angle and work your way down the ski... hard to explain, but easy to do..
I used a coin on the middle third.. Like 20 times forth and back.. And good to go! Remember to do it on both edges, unless your only riding rails with the same edge first always, if you know what I mean..