In Andhra Pradesh, Tamilnadu, and Maharashtra, deepawali celebrations begin on Naraka Chaturdashi. This is the day Lord krishna slew a demon called Narakaasura. Celebrations begin before dawn with the ritualistic oil bath. While taking an oil bath is a deepawali tradition, it is by no means restricted to just this festival. In most south Indian homes, an abbreviated version of this elaborate ritual is a weekly affair.
Firstly ensure that the bathroom is as dry as possible, ensure that your person is dry. Apply the coconut oil to the scalp and the length of the hair. Apply the sesame oil all over the body. Massage in the oil gently till it is absorbed. Wait for 5 minutes. Now apply a thin layer of the besan paste all over the body. Stand still while it dries. It takes about 10 minutes. Gently rub the besan so that it drops off the body. If the besan is not coming off easily, then dust your body with some of the remaining rice flour and then rub.
Continue the process till all the besan if off your body. Before you do anything else, clean the besan off bathroom floor. Wash off the rest of the oil and besan using just warm/hot water. Do not use soap or body wash.