Sun Bar gives five to seven days as a typical window. DHA creates color at the surface of the skin, so it fades as those outer cells shed. Skin, solution, preparation, and friction can affect how quickly the color fades.
The day before
Exfoliate, especially around the knees, elbows, hands, and ankles. Do your shaving or waxing the day before the spray. Plan manicures or pedicures ahead if they involve soaking or scrubbing.
The day of your spray
Arrive with clean skin. Leave off makeup, lotion, oils, deodorant, and perfume. Bring loose, dark clothing and shoes you can easily slip on. The private booth applies the mist in about a minute, and the color develops over the next several hours.
Ask the desk which shade is available and how to protect the eyes, lips, and other mucous membranes and avoid inhaling the mist. Get the first-rinse time for the solution before you leave.
After the first rinse
Pat dry with a soft towel and use a gentle daily moisturizer. Delay scrubbing and exfoliating until you are ready for the color to come off. Long hot baths, hot tubs, pools, and friction from tight clothing can make the tan fade sooner.
Count back from the event
Sun Bar suggests booking your spray one to two days before a wedding, shoot, or trip. Put shaving or exfoliation on your calendar the day before the spray so the color has time to develop without rushing your preparation.