Exfoliate 24 hours prior to your spray tan with a basic loofah or wash rag. Also, stay away from any heavy exfoliating oils. After showering DO NOT apply lotions, oils, or perfumes.
Shaving should be done 12 hours before your spray tan. Streaks may be an issue in your final tan if you shave right before due to the wax from the shaving bar.
Manicures, pedicures, and waxing should all be done prior to your spray tan.
Make sure to bring loose fitting clothes with you for after your spray tan.