Use a loofah in the shower and gently rub the skin in all the places that you will be applying the tan. Legs, arms and chest are the most important, as these areas are often more dry/oily then other parts, and excess oil build-up or flaking may occur.
There is no point in having an enviable tan if you are going to match it with scary hairy legs.
Chances are that if your skin isn't supple then your tan will flake off within days.
Before you start on that movie star tan, you must prep and pamper your skin to ensure perfect results.