I have only seen on one other video about this type of sidewall preparation. It was just a brief part of the video.
In this super long video I will take you through the process on three different types of skis.
If you have a killer pair of sandwich construction skis and have not done this already, then this is something you should do.
Please don't bother to chime in with remarks until you have listened to the whole video. Yes, I said listen. The video is like all my tuning videos, one learns not just from the visual, but the audio as well.
Be good all. Here you go.