In a detective story setting, Neo-Noir (modern day tech, but more of a 1950's vibe. Think Batman. ..Less spandex.) Our perpetrator is a mad ex-scientist who snapped and is turning teenage girls into his own dolls and leaving them to be found so he can forever preserve their childish innocence. Think Real Dolls. ..But less spandex and Swedish pubic hair.
Here's where I need some people with chemistry/chemics know-how to help me out. Save for resin, what would be a good mixture of chemicals to either petrify a human/normal body or give them a petrified look/feel?