My friend did a spary tan in Beach Bumm Tanning and well lets say she took a shower and it cleaned off. She was upset b.c she had waited the amount of time they told her and it still came off. I have done tanning in a tanning bed and well you can start a month before but I have done it a week before an event, but then again I dont burn easy so I would stay the 12 minutes and go almost 4 times in a week and I usually get the best bed. Just ask the tanning salon. When is your wedding, how many days will you be there before your wedding? Maybe you might have enough time to tan under the sun...