The therapist will return and start by gently rubbing the exfoliant on your back, the backs of your arms, and the backs of your legs and feet. You may be draped with a towel so only the part he/she is working on is exposed. Then you turn over and he/she does the other side.
When the therapist is finished, you usually step into a shower to rinse off. Be sure to rinse thoroughly so you don't take little granules back to the table. And don't use shower gel -- it's good to keep the oil and aromatics on your skin. If the spa is doing the treatment on a wet table, the therapist will either rinse you off with a hand-held shower, or turn on a Vichy shower.