Your soaps are still curing during that 4 to 6 weeks period, so shrink wrapping them would not only curtail that process, but you could very well end up with moldy soap. So yes, your soap needs to breath. Use this time to make more soap. There is no sure, fast way to get your soaps to cure overnight, however, if you discount your water, the cure time can be shortened. I would not advise discounting your water if you are new to soap making, especially the 50/50 method. HTH