This is great solution for MOST accomplished racers.
Like the $1 dollar prep, this involves a little elbow grease, a few tools, and some liquid/paste or spray wax.
High-fluro wax, RAY'S WAY wax wizard, brush, etc.
Scrape the skis, double check the edges for burrs (carefully stone them away if you find any), then brush the skis. Polish with a cloth, if possible. Then apply the mid or high fluro wax of your choice, following the manufacturers directions. Unless you over-apply the wax, this should only cost $5-10/pair.