Here's an easy way top keep glide wax from getting in your classic ski's kick zone when you're glide waxing: use masking tape to cover the kick zone.
Notice the ski below. The back of the kick zone is marked by a little angled Sharpie mark just to the left of the upside down "P" (The "P" is where my kick zone used to be. Either the skis have gotten softer or I've gotten heavier, so the kick zone has moved slightly).
But I'm generally not looking at the side of my ski when I'm ironing or brushing - I'm looking at the top. Can you tell me where the kick zone ends by looking at the top of the ski below?
Ah! Put some masking tape over the ski, ending at the edge of the kick zone. Now I know how far to glide wax AND I don't have to worry about the iron getting too close to the kick zone.
Go one step further - especially if you use a Roto Brush: cover the entire kick zone with masking tape. Now I don't need to worry about messing up the kick zone while scraping or brushing!
Masking tape: Not just for painting anymore. Put it in your wax box!
UPDATE! Received this in e-mail moments after the article was published: