- This tanning essential is a must-have for any regular tanner. It's suitable for all types of tan and is specially formulated to prolong your St. Tropez self tan for up to 3 days longer with even fade. Step 1: For best results when tanning, use 24 hours prior to application. Step 2: Massage into wet skin in circular motions to remove any dead skin cells. Step 3: Rinse to reveal soft, smooth skin - the perfect canvas for any St.Tropez tan application.