What, if any negative effect can heat, humidity and cold have on polystone statues? I have kept my collection (PFs, dios, busts & maquettes) inside since acquiring them but I'm running out of room to store things. I live in a climate of very hot & humid summers (90-100+ F) and winters with temps ranging from 15-40F. If kept in their protective styrofoam, box + shipping box, are statues relatively safe from deterioration?