Thoroughly exfoliate the night before your tan, pay particular attention to hands, feet, elbow and knees.
Hair removal should be done 24 hours before your tan.
Remove deodorant, moisturiser and perfume before your tan
Wear dark loose fitting clothing after your spray tan, also paper underwear can be provided.
Do not shower or exercise until 2-3 hours after your tan.
Use a soap free body wash
Moisturise everyday
Avoid anything that will exfoliate your skin such as massages, body scrubs, exfoliating gloves or sponges and products with AHAs
Remember that a spray tan does not provide any sun protection
I have available an amazing exfoliating glove which is made in Italy and made from natural fibres so it doesn't harm your skin while you are trying to remove your previous tan.
You can also use a good exfoliating sponge, this must be done the day before your tan. If you are having trouble removing previous tan, olive oil or baby oil is very effective used with the sponge and soap.