As a rookie instructor, level 1 to 4 classes will probably be the majority of what you teach. Keep an older pair of skis around for this use. If the skis weren't all that old when you put them into this service, they will be "old" after the first 100 kids ski into you, ski across your skis as you are helping them get up, etc..
For these skis, just do a quick hot wax every week to keep the bases from drying out. You probably can get by with not scraping and just skiing (er, walking) off the excess. In my experience, the wax will last a surprisingly long time because of the slow speeds and relatively small distances covered with beginners.
Also, at the slow speeds and the flat slopes that they will be mostly be used on, you probably won't get much edge damage, and even if they do receive some minor edge damage, would you even notice it at 10 mph, so I don't think edge tuning will be a big deal for them, either.
OTOH, keep your better skis for clinics, higher level classes, exams, personal free skiing, etc. They will see less use, so it will be easier for you to keep them in good shape. Follow the usual recommendations (as per the other posts in this thread) for them.
Tom / PM
[ December 08, 2003, 07:53 AM: Message edited by: PhysicsMan ]