Apply more then 2 coats, but wash them off - I know it sounds strange. Think of it as having a "base" tan. 48 hours prior, get a full coat of protan, let it dry and when you wake up, take a good shower. The night before, do 2 coats of pro-tan, and make sure whoever is doing the coating is making it even - pt can leave spots if done wrong. After the 1st coat you'll know if the protan shade is right or you need a 2nd and possible 3rd coat - that's going to be up to you at that point.