The rectangular wild boar brush T0164B is designed to wipe wax from structures (basic models) in ski bases and snowboards after using the plexiglass scraper: It should be used in one direction, from top to tail.

Two brushes are enough for standard waxes:

After scraping the wax with a plexiglass scraper, use a steel brush or a bronze brush. Steel is more efficient and lasts longer than bronze. The scraper brush is the most important brush!
For the finish, use a fine nylon brush.