You will find some of the best ski waxing tutorials or instructions on the Hertel ski wax website. Buy the big block from Hertel and you will have less concerns about cost. I see untrained ski tuners make several mistakes that both increase their costs and limit the durability of their wax jobs.
- using too much wax
- failing to get the wax fully liquified and forced into the pores of the base
- scraping while the wax is too warm. It takes more work to scrape and brush when the wax is cold, but allowing it to cool completely results in a longer lasting and better performing tune.
- reheating the wax to scrape it!
I Think, Therefore I Ski