First the skin is prepped with a pre-wax gel. This removes oiliness from the hair to ensure good adhesion with the wax.
A further thin layer of oil is sometimes applied depending on the skin type and the area. This does the same job as the gel, but also protects the skin.
2 Different types of wax are generally used: Soft (Hot) wax and Strip wax.
Soft Wax: (Also called Hot Wax by some)
This is a bubblegummy type of wax applied with a wooden spatula. The wax is heated to a gooey consistency so that it can adhere to the hair when applied, but not uncomfortably hot. It is applied along the direction of the hair growth.
When it cools down and sets after a short while, the wax is pulled off against the direction of hair growth, taking the hair with it.
Hot wax is generally used in more sensitive areas like the genitals, crack and faces because it is more gentle. Some therapists would do your entire body using only soft wax ... this is a treat, but a very LONG one!
This is a more runny type of wax that runs at a higher temperature than soft wx. It is generally applied in a very thin layer with a steel spatula, also along the direction of the hair growth. A special paper or fabric strip is placed on the wax and pressed down to ensure good adhesion.
When the strip is pulled away rapidly against the growth direction, the hair goes with it.
Strip wax is generally used for larger areas like backs, arms and legs.
Deciding which wax to use in certain areas may be a matter of economics and time vs. comfort: Strip Wax is quicker while Soft Wax is gentler...
WARNING: In some countries strip wax is used to remove genital hair....OUCH!.... Not a good idea... Try to encourage your therapist to try Soft (or sometimes called 'Hot') wax down "there"....