all right heres what ur gunna need :
a nice big rock
and an ice cube
now ur gunna wanna rub that ice all over ur bases until she turs to water the scrape the edges with a rock (and dont be affraid to apply a little elbow grease) now take ur hamme bash the edges until they look like there back in ur ski properly a few divits is normalthe take ur chainsaw and just rub her sideways all along ur base tilting its sligthe to carve out any scratches and then when all thats done spit on them , yell 'WHOS YOUR DADDY' and walk away triumphant with a freshly tuned set of boards!
SKI FOR LIFE!