Remove the saran wrap immediately. It will ruin the paintings. They need to breathe.

Store then standing on end like Laura said. Get some cheap frames to put around the to act as spacers or dividers. Nothing should be touching the fronts of these paintings. Go to the local art store (a REAL art store, not a craft store) and they sell document cleaning solutions that you can use to safely clean hte surface of these painintgs. I've done it many times in my life slowly and patiently with a small paintbrush dipped in the cleaner.