What I have learned over the last 3 years in the tanning business is that exfoliation is an important factor in a long lasting and natural fading airbrush spray tan. It is also a good habit when your not airbrush tanning as well. What it does is removes the skin cells from the outermost surface. This promotes even coverage and lengthens the duration of your tan by removing cells that would otherwise flake off.
What I always recommend to my clients is purchasing the $4.00 exfoliating gloves from Target. I have found that these gloves work much better than any salt scrub or oil based cream that I have tried. Most scrubs and creams have mineral oil as a main ingredient which can block pores from absorbing the tanning solution. Using the gloves with your non-mineral oil body wash will save you money and ensure the best airbrush tan possible.